The invention discloses a self-service control device for vehicle gas. The self-service control device for the vehicle gas comprises an ECU and a change-over switch, wherein control programs for classifying supplied gas according to the Wobbe indexes are stored in the ECU; the change-over switch is electrically connected with the ECU and comprises different change-over gears, and output signals of all the change-over gears correspond to the components of the gas of all the types one to one; and the ECU starts the different control programs according to the different output signals to control supply of the corresponding gas. By the adoption of the self-service control device for the vehicle gas, the program matched with the components of the current gas can be called in a self-service manner.