diff --git a/web/src/components/MemoEditor.tsx b/web/src/components/MemoEditor.tsx
index 9d8560bb..9da0d341 100644
--- a/web/src/components/MemoEditor.tsx
+++ b/web/src/components/MemoEditor.tsx
@@ -8,44 +8,11 @@ import toastHelper from "./Toast";
 import Editor, { EditorRefActions } from "./Editor/Editor";
 import "../less/memo-editor.less";
 
-const getCursorPostion = (input: HTMLTextAreaElement) => {
-  const { offsetLeft: inputX, offsetTop: inputY, selectionEnd: selectionPoint } = input;
-  const div = document.createElement("div");
-
-  const copyStyle = window.getComputedStyle(input);
-  for (const item of copyStyle) {
-    div.style.setProperty(item, copyStyle.getPropertyValue(item));
-  }
-  div.style.position = "fixed";
-  div.style.visibility = "hidden";
-  div.style.whiteSpace = "pre-wrap";
-
-  const swap = ".";
-  const inputValue = input.tagName === "INPUT" ? input.value.replace(/ /g, swap) : input.value;
-  const textContent = inputValue.substring(0, selectionPoint || 0);
-  div.textContent = textContent;
-  if (input.tagName === "TEXTAREA") {
-    div.style.height = "auto";
-  }
-
-  const span = document.createElement("span");
-  span.textContent = inputValue.substring(selectionPoint || 0) || ".";
-  div.appendChild(span);
-  document.body.appendChild(div);
-  const { offsetLeft: spanX, offsetTop: spanY } = span;
-  document.body.removeChild(div);
-  return {
-    x: inputX + spanX,
-    y: inputY + spanY,
-  };
-};
-
 interface Props {}
 
 const MemoEditor: React.FC<Props> = () => {
   const editorState = useAppSelector((state) => state.editor);
   const tags = useAppSelector((state) => state.memo.tags);
-  const [isTagSeletorShown, toggleTagSeletor] = useToggle(false);
   const [isUploadingResource, setIsUploadingResource] = useToggle(false);
   const editorRef = useRef<EditorRefActions>(null);
   const prevGlobalStateRef = useRef(editorState);
@@ -187,61 +154,6 @@ const MemoEditor: React.FC<Props> = () => {
 
   const handleContentChange = useCallback((content: string) => {
     setEditorContentCache(content);
-
-    if (editorRef.current) {
-      const selectionStart = editorRef.current.element.selectionStart;
-      const prevString = content.slice(0, selectionStart);
-      const nextString = content.slice(selectionStart);
-
-      if (prevString.endsWith("#") && (nextString.startsWith(" ") || nextString === "")) {
-        toggleTagSeletor(true);
-        updateTagSelectorPopupPosition();
-      } else {
-        toggleTagSeletor(false);
-      }
-
-      editorRef.current?.focus();
-    }
-  }, []);
-
-  const handleTagTextBtnClick = useCallback(() => {
-    if (!editorRef.current) {
-      return;
-    }
-
-    const currentValue = editorRef.current.getContent();
-    const selectionStart = editorRef.current.element.selectionStart;
-    const prevString = currentValue.slice(0, selectionStart);
-    const nextString = currentValue.slice(selectionStart);
-
-    let nextValue = prevString + "#" + nextString;
-    let cursorIndex = prevString.length + 1;
-
-    if (prevString.endsWith("#") && nextString.startsWith(" ")) {
-      nextValue = prevString.slice(0, prevString.length - 1) + nextString.slice(1);
-      cursorIndex = prevString.length - 1;
-    }
-
-    editorRef.current.element.value = nextValue;
-    editorRef.current.element.setSelectionRange(cursorIndex, cursorIndex);
-    editorRef.current.focus();
-    handleContentChange(editorRef.current.element.value);
-  }, []);
-
-  const updateTagSelectorPopupPosition = useCallback(() => {
-    if (!editorRef.current || !tagSeletorRef.current) {
-      return;
-    }
-
-    const seletorPopupWidth = 128;
-    const editorWidth = editorRef.current.element.clientWidth;
-    const { x, y } = getCursorPostion(editorRef.current.element);
-    const left = x + seletorPopupWidth + 16 > editorWidth ? editorWidth + 20 - seletorPopupWidth : x + 2;
-    const top = y + 32 + 6;
-
-    tagSeletorRef.current.scroll(0, 0);
-    tagSeletorRef.current.style.left = `${left}px`;
-    tagSeletorRef.current.style.top = `${top}px`;
   }, []);
 
   const handleUploadFileBtnClick = useCallback(() => {
@@ -265,8 +177,8 @@ const MemoEditor: React.FC<Props> = () => {
 
   const handleTagSeletorClick = useCallback((event: React.MouseEvent) => {
     if (tagSeletorRef.current !== event.target && tagSeletorRef.current?.contains(event.target as Node)) {
-      editorRef.current?.insertText((event.target as HTMLElement).textContent + " " ?? "");
-      toggleTagSeletor(false);
+      editorRef.current?.insertText(`#${(event.target as HTMLElement).textContent} ` ?? "");
+      editorRef.current?.focus();
     }
   }, []);
 
@@ -294,8 +206,13 @@ const MemoEditor: React.FC<Props> = () => {
         {...editorConfig}
         tools={
           <>
-            <div className="action-btn">
-              <img className="icon-img" src="/icons/tag.svg" onClick={handleTagTextBtnClick} />
+            <div className="action-btn tag-action">
+              <img className="icon-img" src="/icons/tag.svg" />
+              <div ref={tagSeletorRef} className="tag-list" onClick={handleTagSeletorClick}>
+                {tags.map((t) => {
+                  return <span key={t}>{t}</span>;
+                })}
+              </div>
             </div>
             <div className="action-btn">
               <img className="icon-img" src="/icons/image.svg" onClick={handleUploadFileBtnClick} />
@@ -304,15 +221,6 @@ const MemoEditor: React.FC<Props> = () => {
           </>
         }
       />
-      <div
-        ref={tagSeletorRef}
-        className={`tag-list ${isTagSeletorShown && tags.length > 0 ? "" : "!hidden"}`}
-        onClick={handleTagSeletorClick}
-      >
-        {tags.map((t) => {
-          return <span key={t}>{t}</span>;
-        })}
-      </div>
     </div>
   );
 };
diff --git a/web/src/less/editor.less b/web/src/less/editor.less
index 05537dc4..79e170d1 100644
--- a/web/src/less/editor.less
+++ b/web/src/less/editor.less
@@ -38,6 +38,24 @@
         > .tip-text {
           @apply hidden ml-1 text-xs leading-5 text-gray-700 border border-gray-300 rounded-xl px-2;
         }
+
+        &.tag-action {
+          @apply relative;
+
+          &:hover {
+            > .tag-list {
+              @apply flex;
+            }
+          }
+
+          > .tag-list {
+            @apply hidden flex-col justify-start items-start absolute top-6 left-0 p-1 z-10 rounded w-32 max-h-52 overflow-auto bg-black;
+
+            > span {
+              @apply w-full text-white cursor-pointer rounded text-sm leading-6 px-2 hover:bg-gray-700;
+            }
+          }
+        }
       }
     }
 
diff --git a/web/src/less/memo-content.less b/web/src/less/memo-content.less
index b6fcd9af..171e67c7 100644
--- a/web/src/less/memo-content.less
+++ b/web/src/less/memo-content.less
@@ -21,11 +21,11 @@
 
   .counter-block,
   .todo-block {
-    @apply inline-block text-center w-7 font-mono select-none;
+    @apply float-left inline-block box-border text-center w-7 font-mono select-none;
   }
 
   .todo-block {
-    @apply w-4 h-4 leading-4 border rounded float-left box-border text-lg cursor-pointer shadow-inner hover:opacity-80;
+    @apply w-4 h-4 leading-4 border rounded box-border text-lg cursor-pointer shadow-inner hover:opacity-80;
     margin-top: 6px;
     margin-left: 6px;
     margin-right: 6px;
diff --git a/web/src/less/memo-editor.less b/web/src/less/memo-editor.less
index 6d6c7e2c..614b83ec 100644
--- a/web/src/less/memo-editor.less
+++ b/web/src/less/memo-editor.less
@@ -12,35 +12,6 @@
   }
 
   > .memo-editor {
-    .flex(column, flex-start, flex-start);
-    position: relative;
-    width: 100%;
-    height: auto;
-    background-color: white;
-  }
-
-  > .tag-list {
-    .flex(column, flex-start, flex-start);
-    position: absolute;
-    z-index: 10;
-    background-color: rgba(30, 30, 30, 0.9);
-    padding: 2px;
-    border-radius: 4px;
-    width: 128px;
-    max-height: 200px;
-    overflow: auto;
-
-    > span {
-      width: 100%;
-      padding: 2px 6px;
-      color: white;
-      cursor: pointer;
-      border-radius: 4px;
-      font-size: 13px;
-
-      &:hover {
-        background-color: #505050;
-      }
-    }
+    @apply flex flex-col justify-start items-start relative w-full h-auto bg-white;
   }
 }