Abstract: Under the unstable environment where the analog signal is easy to interfere the ordinary sample system is not suitable.It often samples inaccurately and cause the control circuit to produce the wrong control signal and the systematic operation trouble.Staff members can long-instance control and inspect state of sample circuit through TCP/IP network.In this,we use the IRL based sample circuit system,construct and carry on through hardware signal gain,strain wave,etc.dispel the change of analog signal caused by the external interference.IRL technology brings sample system safe,steady and easy to maintain characteristics.