A waterproof passive wireless controller includes at least one waterproof assembly, at least one driver assembly, at least one power generator, at least one communication module, and at least one housing. The waterproof assembly and the housing form at least one waterproof chamber, wherein the power generator and the communication module are disposed in the waterproof chamber. In response to an external force applied on the driver assembly, the power generator is enclosed in a waterproof manner and is driven to actuate by the driver assembly to converts mechanical energy into electrical energy to power the communication module, such that the communication module is activated for sending out a control signal.