In this paper, the potential energy curves of the Λ-S and Ω states of SBr⁺ are reported for the first time, and the spectrum data of some low excited bound states are obtained. The differences in the spectrum properties of main group molecules and SBr⁺ were compared and analyzed, providing a sufficient theoretical basis for the subsequent study of main group molecules. The phenomenon of avoided crossing that occurs in the Ω state is analyzed, and finally it is concluded that this phenomenon mainly occurs in the energy region between 20000 cm^-1 and 40000 cm^-1. Potential transitions in the Ω state capable of achieving laser cooling of SBr⁺ are explored. The Franck-Condon factor, radiation lifetime and Einstein coefficient between Χ³Σ^-_0⁺ and 21Σ⁺_0⁺ are calculated. From the calculation results, we concluded that direct laser cooling of SBr⁺ is not feasible. What we have studied in this paper provides a theoretical basis for subsequent computational exploration of the spectrum properties of SBr⁺.