To solve the problem with the adjustment and control of the ordinary ring rolling machine, TRIZ theory is applied in innovation and analysis. The project of the detecting system improvement to put the measuring device signal into the control process is proposed which is economic, simple and effective. It has been applied successfully into D52 radial ring rolling machine. The fact it has been tested for more than one year proves that the system stability is more reliable, the detection accuracy is quite higher, it can relief the load of work, reduce the production cost and improve the economic efficiency.