The invention relates to the field of oil-gas field development tests, in particular to a bubble point pressure testing device and method. According to the bubble point pressure testing method, fluid bubble point pressure can be rapidly and accurately obtained by testing the changing relation of fluid pressure and volume in capillary tubes. The defects that bubble point pressure is poor in repeatability and low in accuracy when core testing is adopted are overcome, bubble point pressure under the condition of different parameters can be obtained according to the parallel-connection way of the capillary tubes by changing the parameters such as the inner diameter and length of the capillary tubes, and a numerical simulation model can be built.