The present invention relates to a system and method for providing a ubiquitous trail service, which provide optimum path information for each theme trail selected by a user, in accordance with a global positioning system (GPS) and a geographic information system (GIS), and provide information on plants growing around the selected trail via wireless communication. According to the present invention, a user terminal selects a specific trail, in accordance with a selection signal inputted by a user, on a trail map on which a plurality of themed trails are displayed. Then, optimum path information on the trail selected by the user terminal is obtained based on GPS and GIS, and the path of the trail selected by the user is provided. When the user terminal approaches a plant information tag installed in the vicinity of plants growing around the selected trail while walking, the user terminal reads plant information from the tag and outputs the information in images or audio. The user terminal receives detailed information on the plant from a plant information providing server, and outputs the information in images or audio. Further, the user terminal takes, as an input, user identification information from the user, and provides a trail service that is customized to the user.