Provided are a pest control system, a pest control method and a pest control program which can destroy pests from agriculture with no harmful effects to other useful organisms, crops and humans as no pesticides are used. The pest control system comprises； a detection beam emitter for emitting a detection beam for detecting the pests； a reflected signal receptor for receiving a reflected signal reflected from an object irradiated with the detection beam； a pest detecting means for detecting the pests by comparing a reflected data obtained from the reflected signal with a signature data having a signature of target pests stored in a signature data storage means； a targeting means for aiming a destruction beam at said pests for destroying the pests upon detecting the pests； and a destruction beam emitter for emitting the destruction beam to the pests up on detecting the pests.
