The invention relates to an electromagnetic heating heat-supply optimized control method. The electromagnetic heating heat-supply optimized control method comprises the following steps of: S1, setting an electromagnetic heating heat-supply detection and control hardware system which comprises an electromagnetic heater, a power converter, an alternating current power supply, a controller, a working medium temperature detector and a room temperature sensor; and S2, optimizing the control process, and determining on or off of an electromagnetic heating power supply by means of double closed loop control of room temperature feedback and working medium temperature feedback according to the deviation of the room temperature and the working medium temperature and the logical decision of the room temperature deviation state. Compared with the prior art, the method provided by the invention saves electric energy while guaranteeing that the room temperature of a house meets the demand of people to achieve comfort and plays a role of effectively saving energy.