This paper presents a temperature difference driven self-feedback heat convective system with an additional thermal power conversion subsystem based on a traditional heat conduction system.This self-feedback system converts a portion of thermal energy into mechanical energy to make fluid flow in the system.Numerical simulation of the flow and heat transfer performance of the system shows that the heat transfer coefficient of the self-feedback system is 10 times as much as that of heat conduction system and 8.4 times that of natural convection system.Thus the self-feedback system can enhance heat transfer without external mechanical energy input.