A domestic solar energy self-sufficient system controlled through a microcomputer is formed in the mode that a closed circulation thermal system with water as a working medium, a power generation system and a micro hydrogen making and storing device are controlled through a microcomputer control device in a centralized mode, wherein the thermal system is a closed system formed by sequentially connecting a low water tank, a circulating water pump, a solar battery collector tube row combination, an expansion machine, a vacuum pump, a heat exchanger, a hot water storage box and a radiator through pipelines, valves and electromagnetic valves. A temperature sensor and a pressure sensor are arranged in the system. The power generation system is composed of a solar battery photoelectric power generation device and a power generator connected with the expansion machine in the thermal system. Besides, the power generation system is provided with a storage battery used for storing power. The micro hydrogen making and storing device mainly comprises an electrolysis water hydrogen making device and a small safety hydrogen storage device. The microcomputer control device is used for controlling operation of the whole system. Heat, hot water, power and hydrogen fuel are provided for families or units needing the heat, the hot water, the power and the fuel by means of the solar energy self-sufficient system controlled through the microcomputer, and the aim of energy self-sufficiency or partial self-sufficiency is achieved.