The utility model relates to a linkage controller of a ventilating fan of a toilet bowl. The linkage controller of the ventilating fan of the toilet bowl is characterized by comprising a toilet bowl sensing unit and a ventilating fan control unit. The toilet bowl sensing unit comprises a pressure detecting module, a wireless transmitting module and a battery. The ventilating fan control unit comprises a power module, a wireless receiving module, a single-chip microcomputer, a relay module, a keyboard module and a nixie tube module. The power module, the wireless receiving module, the relay module, the keyboard module and the nixie tube module are all connected with the single-chip microcomputer. The controller can automatically switch on the ventilating fan when a user uses the toilet bowl; when the user stops using the toilet bowl, the ventilating fan is automatically switched off after a delay, and delay time can be changed by the user according to actual needs. By the adoption of the linkage controller, electricity is saved, and the problems that the user forgets to switch off the ventilating fan after switching on the ventilating fan, so that the ventilating fan operates for a long time and generates heat and aging of a motor is accelerated or a fire is caused are avoided.