The invention provides a turntable intersection degree and verticality measuring device and method. The turntable intersection degree and verticality measuring method includes the following steps thatlight is split, specifically, the total dual-frequency light is split into multi-channel dual-frequency sub-light; an interference light path is formed, specifically, a turntable is measured with thedual-frequency sub-light to obtain reference light and a measuring interference light path; and the turntable is detected, specifically, according to the phase difference between the reference lightand the interference light path, displacement measurement signals are obtained, and according to the displacement measurement signals corresponding to multiple interference light paths, the turntableintersection degree and/or verticality are obtained. According to the turntable intersection degree and verticality measuring device and method, a common target is used, the measurement process of a multi-shaft turntable is greatly optimized, and installation and disassembly of the target does not require disassembly of the turntable.