As an emerging communication method in the field of wireless communication , optical communication has broad research prospects. The study of its system signal perception method is a key issue in the field of optical communication. At this stage , the signal perception method of optical communication has the problem of poor recogni- tion effect and great interference with noise. In order to solve the problems in the solution , the light communication system signal intelligent perception method based on blockchain technology is proposed. First of all , use the Fourier transformation of the Four Dege to collect optical communication signals with a combination of reconstruction methods. Intelligent perception. The experimental results show that the method of signaling the optical communication system mentioned by the method is higher , the noise is smaller , and it has better practical application value.