A method and system for intelligent automated security trading via the Internet, which provides an Automated Trading Service Center (ATSC), offering a Home Page Service and managing at least one Virtual Fund Manager (VFM) syst. The ATSC is a wireless e-commerce service center providing automated trading services to investors anytime anywhere. By accessing the HPS, the investor can interact with ATSC to develop a custom investment strategy based personal VFM system to automatically trade electronic trading based securities. The VFM is a real time running program incorporated by four engines: the Quote Processing Engine, the Decision Making Engine, the Order Execution Engine, and the Order Processing Engine. Under commands of ATSC server, the VFM can periodically retrieve quotation from the security exchange, monitor the market fluctuation by performing intensive calculations to detect the desired Buy/Sell timing as predetermined by investor's proprietary investment strategy algorithms, and ultimately execute the transaction automatically.