To realize a system for effectively providing information associated with a specific time zone or period in a specific region to a user.

A regional information retrieval system 10 is provided with: a regional information database 33 in which information associated with a specific region is stored so as to be associated with a valid time or valid period; a means for transmitting a Web page 36 for retrieval to a personal computer 14 of a user; a means for, when a retrieval condition for specifying a region, period, and time is transmitted from the personal computer 14, retrieving the regional information database 33 to extract regional information matching the retrieval condition; a means for transmitting a list 37 of the extracted regional information to a personal computer 14; and a means for, when the display request of the specific regional information in a list 37 is outputted from the personal computer 14, extracting the regional information from the regional information database 33, and for transmitting it to the personal computer 14.