A center server configured to perform communications between a first moving object and a second moving object, comprising: a submission information receiving unit configured to receive submission information related to a travel guiding of a travelling route of the first moving object from the first moving object during travelling of the first moving object including travel trajectory information of the first moving object in association with submission information from an occupant of the first moving object; and a guiding information accumulation unit configured to accumulate guiding information which is based on the submission information, a path information acquisition unit configured to acquire path information of a travelling route of the second moving object from the second moving object when a request for guiding information is made by the second moving object; a guiding information extraction unit configured to detect whether guiding information for travel guiding at one or more guide points on a travelling route of the second moving object up to a preset destination of the second moving object is accumulated in the guiding information accumulation unit or not, and configured to extract guiding information from the guiding information accumulation unit which corresponds to a predetermined guide point on the traveling route of the second moving object based on the path information of the travelling route of the second moving object by comparing the path information of the second moving object with the travel trajectory information of the first moving object in association with the submission information; and a guiding information transmission unit configured to transmit the guiding information extracted from the guiding information extraction unit to the second moving object. a submission information receiving unit configured to receive submission information related to a travel guiding of a travelling route of the first moving object from the first moving object during travelling of the first moving object including travel trajectory information of the first moving object in association with submission information from an occupant of the first moving object; and a guiding information accumulation unit configured to accumulate guiding information which is based on the submission information, a path information acquisition unit configured to acquire path information of a travelling route of the second moving object from the second moving object when a request for guiding information is made by the second moving object; a guiding information extraction unit configured to detect whether guiding information for travel guiding at one or more guide points on a travelling route of the second moving object up to a preset destination of the second moving object is accumulated in the guiding information accumulation unit or not, and configured to extract guiding information from the guiding information accumulation unit which corresponds to a predetermined guide point on the traveling route of the second moving object based on the path information of the travelling route of the second moving object by comparing the path information of the second moving object with the travel trajectory information of the first moving object in association with the submission information; and a guiding information transmission unit configured to transmit the guiding information extracted from the guiding information extraction unit to the second moving object.