The invention discloses a real estate payment and certification integrated equipment intelligent terminal system which comprises a signal receiving circuit, a signal calibration circuit and a voltagestabilization output circuit. The signal receiving circuit receives a signal input by a control terminal in the real estate payment and certification integrated equipment intelligent terminal system through using an input end of a signal transmission channel; the signal calibration circuit receives a signal output by the signal receiving circuit in two paths, a first path applies a composite circuit consisting of a transistor Q1 and capacitors C5 and C8 to detect an abnormal signal and discharges the abnormal signal to the ground, and a second path inputs the signal into a composite calibration signal consisting of an operational amplifier AR2, an operational amplifier AR3, an operational amplifier AR4 and an operational amplifier AR5 to calibrate the signal after applying an operational amplifier AR1 to carry out in-phase amplification; meanwhile, transistors Q2 to Q4 are designed to regulate a signal amplitude and stabilize the signal; and finally, the signal is output after the voltage stabilization output circuit applies a transistor voltage stabilization circuit consisting of a transistor Q5 and a voltage stabilization tube D4 to stabilize the voltage. Automatic calibration onthe signal is implemented, the signal is stabilized, and signal confusion is prevented.