Provided are a device and method and an electronic device for temperature control, which are used to solve the problem that electronic devices and components cannot operate in a low-temperature state. The temperature control device includes a temperature detection unit (10) configured to detect the operating temperature of a component (16); a heating unit (12) configured to heat the component (16) according to the detection result of the temperature detection unit (10) so that the operating temperature is between a first temperature and a second temperature; and a power supply interface (14) respectively connected to the temperature detection unit (10) and the heating unit (12) and configured to supply power to the temperature detection unit (10) and the heating unit (12). The first temperature is the lower limit value of the operating temperature of the component (16), and the second temperature is the upper limit value of the operating temperature of the component (16). The temperature control device can maintain the operating temperature of an electronic device or a component so that the electronic device and the component thereof overcome a low-temperature obstacle, thereby operating normally.