There are many situation in which the transmitted power adaptive control is needed. In this paper, by using the programmable characteristic of digital resistor, an experiment of adaptive power control in a transmitter - receiver is carried out with the method of combining hardware with software, thus overcoming the influence of various nonlinear factors. Also, this paper shows that the results obtained in the study are obvious and satisfactory in the light of a certain type of radio stations, from this, an effective method of adaptive power control is put forward.