The continuously tunable sum-frequency generation of 367.3-379.4 nm of the Rh·6G dye laser and the Q-YAG laser was obtained in β-BaB2O4 crystal. The sum-frequency output energy is about 2 mJ, and the conversion efficiency is about 12%. The influence of the non-collinear propagation on the output energy and conversion efficiency of turn-frequency generation are also discussed.