Gas field development into the middle and late stage, gas wells to take drainage measures to produce, gas flow rate on the surface of the pipeline fluid capacity decline, fluid accumulation, hydrate, frozen block, etc. For this reason, it is put forward to use the real-time change trend of the data of well site and station site to carry out liquid accumulation analysis, which improves the ability of liquid accumulation identification and rapid location of pipeline, meanwhile, in order to improve the liquid discharge efficiency, designed and manufactured an automatic pigging device with solar power supply and no gas leakage, and realized the remote control of pigging operation through the built gas well digital system, the utility model effectively reduces the field operation intensity, and improves the resource utilization ratio and the pipeline transportation efficiency.