To start to collect information in a short period of time, and to collect various pieces of information of a target simply and at a low cost without the need of a ground relay station or a communication satellite for relaying radio waves.

An information collection system includes: a flying body B for information collection which is loaded on a rocket launched toward a target, is released in the vicinity of the target, collects various pieces of information of the target while staying in air, and transmits the collected various pieces of information; and a ground station 10 which receives the various pieces of information transmitted from the flying body B for information collection.