With the Cross Linked Polyethylene (XLPE) power cables increasingly widely used in urban power transmission and distribution network, the reliable operation of XLPE insulated power cable line is becoming more and more important for economic and social development. [1] And there is a need to ensure the reliability of cables by detecting the cable insulation aging state on-line. So that, we developed a set of cable on-line monitoring system which can determine the aging state by the analysis of the current flowing through the cable insulation based on current comparator. Such a distributed measuring system requires the data to be transferred in a wireless way in real time. In order to ensure the reliability of communication, several programs were presented to solve the problem of wireless data transmission between two test equipment based on General Packet Radio Service (GPRS) in this paper. The most suitable one will be select from these programs by analyzing advantages and disadvantages of them to direct the follow-up system debugging. Keywords-cable on-line monitoring; insulation aging state; wireless data transmission; GPRS