The invention relates to the field of two-phase/multi-phase flow measurement, aims to realize the non-intrusive and high precision synchronization acquisition of the flow parameters of a liquid film in (outside) a pipeline and temperature field distribution, and is used for the deep study of a liquid film flow characteristic, a heat transfer characteristic and the like. The employed technical scheme is that according to the liquid film temperature field and flow field simultaneous measurement method based on laser induced fluorescence, when a liquid film with dissolved fluorescent dye forms a dynamic liquid film in a pipeline inner/outer wall or a flat panel, a liquid film fluorescence image is taken through a high speed camera, for a same taken fluorescence image, based on a high speed calibration parameter, the geometric feature of the liquid film fluorescence image is accurately extracted, and flow field characteristics comprising a liquid film thickness and a velocity are obtained. At the same time, based on a calibrated temperature-fluorescence intensity calibration curve, laser intensity calibration and a fluorescence intensity extraction method, a liquid film fluorescence image brightness is accurately extracted, and the instantaneous and time averaged temperature field distribution of the liquid film are obtained. The method is mainly applied to a two-phase/multi-phase flow measurement occasion.