The utility model relates to the electric power field and more specifically relates to a temperature control device of a refrigerator. The temperature control device comprises a power source, a temperature controller, a thermal protective relay, a motor and a starting relay that are successively connected in series. A switch is in series connection with an illuminating lamp and then is in parallel connection with the power source. A working winding inside the motor is in series connection with a coil inside the starting relay and then is in series connection with the power source. A second main contact inside the starting relay is in series connection with the power source. A starting winding inside the motor is in series connection with a first main contact inside the starting relay. A metal sheet is arranged above the coil. Two ends of the metal sheet are equipped with a first static contact and second static contact that respectively correspond to the first main contact and the second main contact. The temperature controller includes a housing, a fixed contact, a metal movable plate hinged to the housing, and a temperature control panel and a temperature-sensitive chamber that are hinged to the housing. The temperature control device of a refrigerator, having a simple structure, can control and protect the motor and a refrigeration system in the whole refrigerator.