diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9eeb650c..48e0d212 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -33,6 +33,7 @@ Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how
 * Add command to clean log files (#97)
 * Add command to clean autoloads file (#98)
 * Add command to clean pkg-file (#99)
+* feat: Add option `-o`/`--output` to output log for Eask checker (#100)
 
 ## 0.7.x
 > Released Sep 08, 2022
diff --git a/cmds/checker/check-eask.js b/cmds/checker/check-eask.js
index 3e96efa8..97f23de8 100644
--- a/cmds/checker/check-eask.js
+++ b/cmds/checker/check-eask.js
@@ -27,6 +27,11 @@ exports.builder = {
     requiresArg: false,
     type: 'array',
   },
+  output: {
+    description: 'Output result to a file',
+    alias: 'o',
+    type: 'string',
+  },
   json: {
     description: 'Output lint result in JSON format',
     type: 'boolean',
diff --git a/lisp/_prepare.el b/lisp/_prepare.el
index 74f45e7f..80f05275 100644
--- a/lisp/_prepare.el
+++ b/lisp/_prepare.el
@@ -444,6 +444,7 @@ the `eask-start' execution.")
 (defun eask-json-p ()          (eask--flag "--json"))           ; --json
 
 ;;; String (with arguments)
+(defun eask-output ()      (eask--flag-value "-o"))             ; --o, --output
 (defun eask-proxy ()       (eask--flag-value "--proxy"))        ; --proxy
 (defun eask-http-proxy ()  (eask--flag-value "--http-proxy"))   ; --http-proxy
 (defun eask-https-proxy () (eask--flag-value "--https-proxy"))  ; --https-proxy
@@ -504,15 +505,16 @@ other scripts internally.  See function `eask-call'.")
      "--timestamps" "--log-level"
      "--log-file"
      "--elapsed-time"
-     "--no-color"))
+     "--no-color"
+     "--json"))
   "List of boolean type options.")
 
 (defconst eask--option-args
   (eask--form-options
-   '("--proxy" "--http-proxy" "--https-proxy" "--no-proxy"
+   '("-o"
+     "--proxy" "--http-proxy" "--https-proxy" "--no-proxy"
      "--verbose" "--silent"
-     "--depth" "--dest"
-     "--json"))
+     "--depth" "--dest"))
   "List of arguments (number/string) type options.")
 
 (defconst eask--command-list
diff --git a/lisp/checker/check-eask.el b/lisp/checker/check-eask.el
index d388ad2e..cf1bce98 100644
--- a/lisp/checker/check-eask.el
+++ b/lisp/checker/check-eask.el
@@ -115,7 +115,8 @@
                             default-directory))
        (files (or (eask-expand-file-specs (eask-args))
                   (eask-expand-file-specs '("Eask*" "**/Eask*"))))
-       checked-files)
+       checked-files
+       content)
   ;; Linting
   (dolist (file files)
     (eask--save-eask-file-state
@@ -128,15 +129,25 @@
   (eask-msg "")
   (cond ((and (eask-json-p)  ; JSON format
               (or eask--checker-warnings eask--checker-errors))
-         (eask-msg
-          (eask--pretty-json (json-encode
-                              `((warnings . ,eask--checker-warnings)
-                                (errors   . ,eask--checker-errors))))))
+         (setq content
+               (eask--pretty-json (json-encode
+                                   `((warnings . ,eask--checker-warnings)
+                                     (errors   . ,eask--checker-errors)))))
+         (eask-msg content))
         (eask--checker-log  ; Plain text
+         (setq content
+               (with-temp-buffer
+                 (dolist (msg (reverse eask--checker-log))
+                   (insert msg "\n"))
+                 (buffer-string)))
          (mapc #'eask-msg (reverse eask--checker-log)))
         (t
          (eask-info "(Checked %s file%s)"
                     (length checked-files)
-                    (eask--sinr checked-files "" "s")))))
+                    (eask--sinr checked-files "" "s"))))
+
+  ;; Output file
+  (when (and content (eask-output))
+    (write-region content nil (eask-output))))
 
 ;;; checker/check-eask.el ends here
diff --git a/src/util.js b/src/util.js
index feb4bfdf..bde053a6 100644
--- a/src/util.js
+++ b/src/util.js
@@ -92,6 +92,7 @@ function _global_options(argv) {
   /* Number type */
   flags.push(def_flag(argv.verbose, '--verbose', argv.verbose));
   /* String type */
+  flags.push(def_flag(argv.output, '-o', argv.output));
   flags.push(def_flag(argv.proxy, '--proxy', argv.proxy));
   flags.push(def_flag(argv['http-proxy'], '--http-proxy', argv['http-proxy']));
   flags.push(def_flag(argv['https-proxy'], '--https-proxy', argv['https-proxy']));