For the quantitative study of steady-state remanence of power transformers, an indirect measurement method for simulating remanence by DC magnetization is proposed. It is used to solve the problem that the conventional flux measurement method can not be directly used to measure the remanence of transformer after switching off. Through the first peak value of inrush current after no-load switching on of transformer, the corresponding DC magnetization force is obtained by means of the peak value curve of DC excitation. Then the corresponding flux is deduced from the peak magnetization curve of the transformer, which is the remanence before the corresponding no-load switching on. Finally, the feasibility of the method is verified by physical simulation. This method can be used to study the remanence characteristics of transformer core and to verify the estimation results of remanence. This work is supported by National Key Research and Development Program of China (No. 2017YFB0902901).