An information processing system includes vehicles and a server. Each of the vehicles generates a video obtained by imaging outside scenery in association with a time and transmit the video and position information of a host vehicle at a time when the video is generated to the server. The server detects attribute information of a person in the video from the video and detects position information of the person at the time based on the position information of the host vehicle at the time when the video is generated, when the video and the position information are received from the host vehicle. The server specifies the same person appearing in two or more videos of videos respectively received from the vehicles and transmits the attribute information of the specified person and movement path information including time-series data of the position information of the person to a client.