We analyze the normal and anomalous dispersion characteristics of optical materials, and prove that a kind of interferometer based on dispersion characteristics of optical materials can realize the combination of superluminal light and slow light. We also theoretically analyze the spectral sensitivity of Mach-Zehnder (M-Z) interferometer based on superluminal and slow light technology. Compared with the conventional M-Z interferometer which has the same structure with the above interferometer and the M-Z interferometer based on slow light technology, the spectral sensitivity of the M-Z interferometer based on superluminal and slow light technology increases sharply.