edit ~/.emacs, and add the following lines

(when window-system
   (set-face-font 'default "-outline-Droid Sans Mono-normal-normal-normal-mono-14-*-*-*-c-*-iso10646-1")
    (set-fontset-font "fontset-default" '(#x1100 . #xffdc)  '("나눔고딕코딩" . "unicode-bmp")) ;; 유니코드 한글영역
    (set-fontset-font "fontset-default" '(#xe0bc . #xf66e)  '("나눔굴림" . "unicode-bmp")) ;; 유니코드 사용자 영역

(defadvice switch-to-buffer (after activate-input-method activate)
 (activate-input-method "korean-hangul"))

fonts-namum-* must be installed on the Debian system as

$ aptitude search nanum
i   fonts-nanum                          - Nanum Korean fonts                            
i   fonts-nanum-coding                   - Nanum Coding fixed width Korean TrueType font 
i   fonts-nanum-eco                      - Nanum Eco Korean font                         
i   fonts-nanum-extra                    - Additional Nanum Korean fonts                 
i   fonts-nanum-gothic-light             - Nanum Gothic Light Korean font   

posted by citadel