Abstract: To preserve the valuable characteristic calculation methods and key data of oil/gas storage and transportation engineering, and to promote transfer of such data, an "Oil and Gas Pipeline Common Calculation Toolbox Software" system has been developed. The system includes researches in following four aspects: calculation model, system framework, data structure and system interface to establish a management structure characterized by five "unifications": unified login window, unified platform, unified interface, unified style and unified safety strategy. With service-oriented structure, the system adopted network application development (B/S) with HTTP(S) as guiding protocol and suitable modularize programming principles. Development and application of the "Oil and Gas Pipeline Common Calculation Toolbox Software" system can effectively enhance quality and efficiency of calculations by designers to strengthen the leading role within the industry.