An operating device and an operating method are disclosed. The operating device includes a processing assembly and a control assembly. The control assembly includes a control body, an auxiliary unit and a collecting unit. The auxiliary unit is arranged on the control body, a limb of a user is put on said auxiliary unit, and the collecting unit is arranged on the limb of the user. The collecting unit is configured to collect trembling signals indicating limb trembling of the user, and transmit the trembling signals to the processing assembly. The processing assembly is configured to generate driving signals according to the trembling signals and transmit the driving signals to the auxiliary unit. The auxiliary unit is configured to keep a motion state of said auxiliary unit to be the same as a limb trembling state of the user according to said driving signals.