To provide a golf swing teaching system, enabling each participant to obtain appropriate advices and answers to questions regarding the swing image of the participant from an instructor, etc., via a network.

The golf swing image of the participant, photographed by using a prescribed means, is processed into the prescribed number of divided static images, and the divided static images are received by a server via a communication network and associated with the participant to be stored. An instructor in charge of explanations reads the divided static images from the server and performs commentative processing. The server receives data subjected to the commentative processing via the communication network, and associates the data with the participant to store the data. When the participant makes a request, the server retrieves divided static images that match the retrieval conditions or the processed data, and transmits the retrieved divided static images or the processed data to the terminal of the participant via the communication network.