As public service testing structure of testing products, the quality of product testing report issued by the third-party laboratory has a great impact on the healthy development of market economy. In the face of the new situation of rapid economic development, the third-party laboratory develops rapidly, but the government supervision is not in place, which restricts the healthy and orderly development of the third-party laboratory. Therefore, it is very necessary to study how the government effectively supervises the thirdparty laboratory. This paper takes Suzhou as an example. On the basis of in-depth investigation, using the theory of service government, this paper analyzes the current situation of Suzhou municipal government’s supervision of third-party laboratories, and probes into the problems existing in the supervision and management system, the supervision is not comprehensive, and the independence of the supervision team is not strong. Based on the advanced experience of foreign countries in supervising the third-party laboratory, this paper puts forward some countermeasures and suggestions to promote the Suzhou municipal government to strengthen the supervision of the third-party laboratory from the aspects of improving the implementation rules of laws and regulations, increasing the investment, strengthening the equipment update and team building, increasing the punishment for violations of laws and regulations, and giving full play to the masses and industry supervision.