Abstract: Most of the SCADA system software platforms in long-distance gas pipeline are developed by foreign manufacturers, and the SCADA systems used by domestic enterprises are all constructed by professional companies. Since few manpower was invested during the system construction period, domestic enterprises don't have a deep understanding and master of the system. So the system operation and maintenance are often entrusted to professional companies, bringing inconvenience to them and increasing operating cost. Based on this, following improvements are proposed that relevant national departments should formulate a set of standards as soon as possible for guiding and standardizing the construction of SCADA system; future development of enterprises should be considered and role of the system in operation management should be defined, in order to determine the breadth and depth of the system construction; besides, an appropriate number of personnel should be invested in the system construction and development, so as to provide technical reserves to the system operation and maintenance in later period.