The invention discloses static removal system and method, a washing machine and a drying machine. The static removal system comprises a static sensor, a controller and a static removal device; the static sensor is connected with the controller to detect static quantity information U in an inner barrel and on the surface of clothes and transmit the actually detected static quantity information U to the controller; the controller is used for controlling the static removal device to remove static according to the actually detected static quantity information U from the static sensor. The system is able to detect the static in the inner barrel and on the surface of the clothes and remove the static, thus removing electronic devices of the washing machine and the drying machine from being damaged; the interference on the washing machine and the drying machine is reduced, and the interference of the washing machine and the drying machine is improved; the adverse influence of the static on the surrounding environment and users, in particular the discomfort caused by the static to the user moving out the clothes can be removed.