Energy spectrum measurement device and method

The invention relates to the field of mine detection, and aims at providing an energy spectrum measurement device and method. The device comprises an upper electronic unit chamber and a lower detector chamber. The top part of the upper electronic unit chamber is provided with a handle. A main detector is packaged in the lower detector chamber. Multiple anticoincidence detectors are arranged at the periphery of the main detector. The multiple anticoincidence detectors are externally provided with a shielding layer which is externally provided with a protective layer. The main detector and the anticoincidence detectors comprise scintillation crystal, an optical coupling body, a photodiode, a spectrum stabilization circuit, a pre-amplification circuit and a bias power supply circuit. The spectrum stabilization circuit is composed of a current monitoring part and a temperature detection part. The electronic unit chamber internally comprises a charging battery, a power supply conversion circuit, a summation circui