According to the latest version of the third generation mobile communication released by ITU in March 2001, this paper outlines the developing background of 3G and introduces several international standards finally accepted by ITU and their characteristics, then summarizes the latest researching and developing trend and the achievement in this field around the world. The paper emphatically discusses the schemes, system advantages, technical features and developing prospects of the TD-SCDMA - one of the 3G international standards and with our own intellectual property. Finally the paper presents several proposals concerning the development of 3G mobile communication in our country.