This paper presents a review on the state of current measuring techniques for gas-liquid multiphase flow rates.After briefly discussing the basic idea on measuring methods for single-phase and two-phase flows, existing methods for the two-phase flow rates are classified into several types, that is, with or without a homegenizing device, single or combind method of several techniques, with intrusive or non-intrusive sensors, and physical or software method. Each methods are comparatively reviewed in view of measuring accuracy and manageability. Its scope also containes the techniques developed for petroleum-gas-water flow rates.