The solubility of 2,2'-(1,2-ethenediyldi-4,1-phenylene) bis-benzoxazole (OB-1) in four monosolvents (chlorobenzene, N-methyl-2-pyrrolidone (NMP), N,N-dimethylformamide (DMF), and water) and four different binary solvents (chlorobenzene-DMF, NMP-water, DMF-water, and chlorobenzene-NMP) was measured by a dynamic method at temperatures ranging from 323.15-383.15 K under an atmospheric pressure of 0.101 MPa. The experimental data shows that the solubility of fluorescent agent OB-1 increases with an increase in temperature in both the pure and binary solvents. The solubility of the fluorescent agent OB-1 in four pure solvents increases in the following order: chlorobenzene > NMP > DMF > water. The modified Apelblat equation, lambda h equation, nonrandom two-liquid (NRTL) model, and Wilson equation were used to correlate the experimental data, and the experimental solubility and correlation equations in this work can be used as essential data and models in the industrial manufacture process of OB-1.