The present disclosure in some embodiments relates to an automatic configuration tool to configure and install a distributed antenna system and an installation guide using the same. According to an aspect of the present disclosure, a user or a designer is graphically provided with a user interface to define a shape of the distributed antenna system, and is provided with a configuration tool for generating a configuration file for a configuration of an actual distributed antenna system. According to another aspect of the present disclosure, there is suggested a distributed antenna system for providing an installation guide function by using a configuration file generated in the configuration tool.