Abstract: Ap/Bp stars refer to stars with effective temperatures between 8000 K and 16000 K, spectral types ranging from B8 to F0, and strong, variable magnetic fields. The surface magnetic field strengths of these stars vary from tens of Gauss to tens of thousands of Gauss. Stochastic low-frequency variability (SLFV) has been detected across a wide range of stellar masses, yet most studies have concentrated on massive stars. Using high-precision photometry from the Transiting Exoplanet Survey Satellite (TESS), we extend SLFV studies from massive stars to intermediate-mass Ap/Bp stars. The results show that the slope \gamma of the SLFV in the sample of Ap/Bp stars is less than 4.6, with the majority of \gamma values ranging from 0.5 to 2.5. The characteristic frequency v\mathrm_char is mainly within the range of 0 to 1.8 \mathrmd^-1, and the amplitude \lg\alpha_0 is primarily distributed between 1.2 and 4.0. These findings are consistent with previous studies. The analysis reveals that there is no correlation between the mass, radius, and evolutionary stage of Ap/Bp stars and their SLFV. After comparison with the observations, we attribute the SLFV in Ap/Bp stars to internal gravity wave (IGW).