A storage apparatus, comprising a compartment; and a box assembly, which is arranged in the compartment. The box assembly comprises: a first side wall; a second side wall arranged opposite the first side wall; a first conductive layer arranged on the second side wall; a first electret membrane, which is arranged on the first side wall, located between the first side wall and the first conductive layer and arranged parallel to the first conductive layer; and an adjusting component, which is used for adjusting the electric field intensity between the first conductive layer and the first electret membrane.