The present invention collects various location information of a user using RSSI values obtained when communicating with a neighboring wireless network, and combines sensor information and time information with collected location information to infer user's preference and life pattern. To provide a service providing system and method optimized for a user's life pattern in a computing environment, the service providing system optimized for a user's life pattern according to the present invention, grasp and calculate the user's location information in a ubiquitous computing environment, A user terminal for recording time information when the location of the user is calculated, receiving sensor information, and wirelessly transmitting the location information, time information, and sensor information; A database for storing the location information, time information and sensor information; And store the location information, the time information, and the sensor information in the database, and when the location information, the time information, and the sensor information are received, infer the user's preference and life pattern using the information stored in the database. And a server transmitting wirelessly to the terminal.;Ubiquitous, computing environment, life pattern, optimization, location information, time information
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