System and method for managing log on a web site

PURPOSE: A system and a method for managing a log on a web site are provided to enable a user to extract the data related to a user's activity on the connected web site even if the user does not pass a user authentication procedure. CONSTITUTION: A web server(20) includes a basic module(21) managing an access of a client(10) connected through the Internet, an automatic cookie generating module(22) automatically generating a cookie and a log transmitting module(24) transmitting the extracted log data in the real-time. A log management server(30) includes a real-time log receiving module(31) receiving the log data, a log storing module(32) converting the received log data into the analyzable data and storing the converted data, a log outputting module(33) displaying a result analyzing the data through a web browser, and a database(34) storing the converted log data. A network real-time log extracting module(40) extracts the log data by reading and analyzing a packet communicating between the web server(20) and the client(10), and transmits the log data to the real-time log transmitting module(24) of the web server(20).