diff --git a/README-ko.md b/README-ko.md
index 04aa681..5bb5e8c 100644
--- a/README-ko.md
+++ b/README-ko.md
@@ -20,6 +20,23 @@ brew install droller
 brew remove droller
 ```
 
+## Options
+
+| option    | description                            | example           |
+|-----------|----------------------------------------|-------------------|
+| <uri>     | uri를 인덱스에 추가합니다.             | droller http://.. |
+| random,   | 랜덤으로 문서를 선택합니다.            | droller           |
+| open, o   | 선택된 문서를 웹 브라우저로 봅니다.    | droller o         |
+| +1, 1     | 선택된 문서에 +1 점을 줍니다.          | droller 1         |
+| -1, -     | 선택된 문서에 -1 점을 줍니다.          | droller -         |
+| delete, d | 선택된 문서를 삭제합니다.              | droller d         |
+| status, s | 선택된 문서 정보를 봅니다.             | droller s         |
+| ranking   | 모든 문서의 점수 랭킹을 봅니다.        | droller ranking   |
+| backup, b | git을 사용해 인덱스 파일을 백업합니다. | droller b         |
+| log, l    | 백업 로그를 봅니다.                    | droller l         |
+| edit, e   | 인덱스 파일을 편집합니다.              | droller e         |
+| help, h   | 도움말을 봅니다.                       | droller h         |
+
 ## How to use
 
 Twitter나 Facebook에 누군가 괜찮아보이는 링크를 올리면 복사해서 터미널에 다음과 같이 입력합니다.
@@ -77,3 +94,4 @@ droller help
 ```sh
 droller edit
 ```
+
diff --git a/README.md b/README.md
index e8d980a..fd32227 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,23 @@ brew install droller
 brew remove droller
 ```
 
+## Options
+
+| option    | description                          | example           |
+|-----------|--------------------------------------|-------------------|
+| <uri>     | Add a record to index file.          | droller http://.. |
+| random,   | Select randomly.                     | droller           |
+| open, o   | Open the selected record.            | droller o         |
+| +1, 1     | +1 to the selected record.           | droller 1         |
+| -1, -     | -1 to the selected record.           | droller -         |
+| delete, d | Delete a record from the index file. | droller d         |
+| status, s | Show the selected record.            | droller s         |
+| ranking   | Show the ranking table.              | droller ranking   |
+| backup, b | Back up your index file using git.   | droller b         |
+| log, l    | Show backup logs.                    | droller l         |
+| edit, e   | Edit the index file.                 | droller e         |
+| help, h   | Help.                                | droller h         |
+
 ## How to use
 
 If someone posts a link that looks good on Twitter or Facebook, copy it. Then type the following command in the terminal.
diff --git a/bin/droller b/bin/droller
index 538d02e..b94023d 100755
--- a/bin/droller
+++ b/bin/droller
@@ -5,17 +5,17 @@ INDEX="$DIRECTORY/index"
 HEAD="$DIRECTORY/head"
 
 ## usage: droller [s | o | 1 | -1 | ranking | edit | | <uri> | d | h]
-## [status | s] # Show the selected record      # Example: droller s
+## [<uri>]      # Add a record to index file    # Example: droller http://www...
+## [random | ]  # Select randomly               # Example: droller
 ## [open | o]   # Open the selected record      # Example: droller o
 ## [+1 | 1]     # +1 to the selected record     # Example: droller 1
 ## [-1 | -]     # -1 to the selected record     # Example: droller -1
+## [delete | d] # Delete a record from the index file  # Example: droller d
+## [status | s] # Show the selected record      # Example: droller s
 ## [ranking]    # Show the ranking table        # Example: droller ranking
-## [random | ]  # Show the ranking table        # Example: droller
+## [backup | b] # Back up your index file       # Example: droller backup
+## [log | l]    # Show backup logs              # Example: droller l
 ## [edit | e]   # Edit the index file           # Example: droller edit
-## [<uri>]      # Add a record to the index file       # Example: droller http://www...
-## [delete | d] # Delete a record from the index file  # Example: droller d
-## [backup | b] # Back up your index file.      # Example: droller backup
-## [log | l]    # Show backup logs.             # Example: droller l
 ## [help | h]   # Help                          # Example: droller h
 
 main() {