A thermally activated delayed fluorescence (TADF) material and an application thereof are provided. The blue TADF material has an electron acceptor which exhibits good structural rigidity so as to improve thermal stability of molecules, and three blue TADF materials with good light-emitting properties are designed and synthesized by selecting different raw material-derived functional groups. Furthermore, the blue TADF material provided by the present invention is used as a luminescent material and is applied to an electroluminescent device that has good luminosity and an excellent effect.