The present invention relates to a variable coffee roasting device. The variable coffee roasting device comprises: a housing (3) forming an outer appearance and having a coffee bean outlet (26) and a hopper (8) which supplies green coffee beans on one side, wherein a damper (40) discharging smoke is installed on the other side of the housing (3)； a burner (11) which supplies heat by being installed on the inner side of the housing (3)； an inner drum (5) which is installed on the inner side of the housing (3) to rotate and performs roasting by heating the green coffee beans by using heat transferred from the burner (11)； an outer drum (7) which is installed on the inner side of the housing (3) to rotate and partition the circumferential surface into sections, is formed into a barrel shape enclosing the outer side of the inner drum (5), transfers the heat to the inner drum (5) by changing the amount of heat transmitted from the burner (11) by differentiating the heat transmission ratio of each section, and provides multiple roasting modes； a driving unit (15, 17) which rotates the inner drum (5) and outer drum (7)； a position detecting unit (13) which detects the current position of the outer drum (7) by being installed at a position adjacent to the outer drum (7)； a temperature sensor (S) which senses the temperature of the outer drum (7) and the inner drum (5)； and a control unit (18) which processes the roasting by rotating the outer drum and the inner drum (5) by controlling the driving unit (15, 17), the position detecting unit (13), and the temperature sensor (S).본 발명은 가변형 커피 로스팅 장치에 관한 것이다. 그러한 가변형 커피 로스팅 장치는, 외관을 형성하며, 일측에는 생두를 공급하는 호퍼(8) 및 원두 배출구(26)가 장착되고 타측에는 스모크가 배출되는 댐퍼(40)가 배치되는 하우징(3)과； 하우징(3)의 내측에 배치되어 열을 공급하는 버너(11)와； 하우징(3)의 내측에 회전가능하게 배치되어 버너(11)에서 전달된 열을 이용하여 생두를 가열함으로써 로스팅을 진행하는 내부드럼(5)과； 하우징(3)의 내측에 회전가능하게 배치되며, 내부드럼(5)의 외측을 감싼 통형상으로서, 원주면을 구역별로 구분(partition)하고 각 구역의 열 통과 비율을 차등화함으로써 버너(11)에서 전달된 열의 입사양을 가변시켜서 내부드럼(5)에 전달함으로써 복수의 로스팅 모드를 제공하는 외부드
