To provide a baseball team ranking system for performing rating and ranking of a plurality of teams based on baseball game progress information such as win or loss and difference in points, with a comparatively simple method.

A terminal device 1 has a game condition input means for inputting a game condition of a baseball game, an attack progress data input means which collects game progress status information and inputs evaluated data as an game progress data at the time of the particular team attack round, a defense data input means for input data at the time of defense round of the team, and a terminal side communication means which transmits the information data to the data processor 2 through network 3. A data processor is provided with a processor side communication means for receiving transmitted information data, a game information storage means for storing information data of each game of each team separately, a team rating judgment means for setting rating of the team from data information in two or more games of each team, and a ranking means which performs level ranking as a result of comparison of team rating of two or more teams.