A kind of control device with what roaster for coffee bean is to control a roaster for coffee bean, which includes a baking chamber, which includes a radio unit and a control unit. The radio unit receives baking chamber outflow sound, the control unit analyzes the received sound of radio unit institute and judges wherein whether contain a predetermined characteristic, if baking chamber's outflow sound contains the predetermined characteristic, controls the roaster for coffee bean and execute a predetermined action. Thereby, the time point of the roaster for coffee bean actuation can be accurately controlled according to measured sound.一種用於咖啡豆烘焙機的控制裝置，係用以控制一咖啡豆烘焙機，該咖啡豆烘焙機包括有一烘焙室，該控制裝置包含有一收音單元與一控制單元。該收音單元接收該烘焙室傳出聲音，該控制單元分析該收音單元所接收的聲音並判斷其中是否含有一預定特徵，若烘焙室傳出聲音含有該預定特徵，則控制該咖啡豆烘焙機執行一預定動作。藉此，可依據所測得的聲音，精確地控制該咖啡豆烘焙機作動的時點。
