System for automobile defrosting and demisting

The invention provides a system for automobile defrosting and demisting. The system comprises a temperature sensor, a single-chip microcomputer and a microwave transmission device. The temperature sensor is connected with the input end of the single-chip microcomputer, and the output end of the single-chip microcomputer is connected with the microwave transmission device; the temperature sensor is installed on an automobile front windshield for monitoring the temperature rise speed under the defrosting mode, the single-chip microcomputer is used for receiving and processing a signal sent by the temperature sensor and determining whether to start the microwave transmission device or not, and the microwave transmission device is installed inside an automobile instrument desk for heating and transmitting heat; the single-chip microcomputer receives a windshield temperature signal sent by the temperature sensor, according to the temperature rise state, and the microwave transmission device is controlled to be tur