The invention provides a membrane disc flux and bubble point detecting device. The membrane disc flux and bubble point detecting device is characterized in that the membrane disc flux and bubble pointdetecting device comprises a water tank, a base located in the water tank, three or more threaded columns connected to the base, nuts matched with the threaded columns for using, a lower clamping plate, a membrane disc, an air cylinder, an upper clamping plate connected to a piston rod of the air cylinder, a main pipeline, a first branched pipeline, a second branched pipeline, a first electromagnetic valve, a pressure gauge, a second electromagnetic valve, a flowmeter and a self-priming pump, wherein the first branched pipeline and the second branched pipeline communicate with the main pipeline, the first electromagnetic valve and the pressure gauge are sequentially mounted on the first branched pipeline, and the second electromagnetic valve, the flowmeter and the self-priming pump are sequentially mounted on the second branched pipeline. Through unique design, a membrane disc flux detecting device and a membrane disc bubble point detecting device are integrated, the performance detecting efficiency of the membrane disc is improved, the equipment cost is saved, and the workload of technicians is reduced; the ventilation and liquid pumping processes are controlled through the firstelectromagnetic valve and the second electromagnetic valve, and the utilization rate of the membrane disc flux and bubble point detecting device is increased; and the detecting device is provided with the air cylinder, the upper clamping plate and the lower clamping plate compress the membrane disc through the air cylinder without manual control, and thus convenience and rapidness are achieved.