Abstract: The generic technology service platform that “private run with official assisting” is a kind of quasi-bublic organization combined public welfare and business. How can its business model formate and evolve under the driven of the government and market? The single case study of software finds the market can be divided into dogs,cash cows, question marks and stars by means of the modified BCG Matrix.The business model of platform should evolve from a single model that provides quasi-public service mainly to the composite one that provides quasi-public service as basis and market-oriented business as power.The strategies’ development and implementation of the market penetration, the market development, the product development and the diversification are the internal mechanism that promote the evolution of the platform’s business model.