InP/ZnS quantum dots （QDs） with excellent and nontoxic fluorescence properties were prepared by a thermal-injection method in aqueous solution， using tris （dimethylamino） phosphine as phosphine source and indium chloride as indium source. The experimental results showed that the InP/ZnS QDs with a spherical shape belong to sphalerite structure when the molar ratio of reactants was n_P^3-∶n_In³⁺=5∶1 and ZnS reaction time was 60 min. The fluorescence spectra of InP/ZnS QDs was adjustable in the range of 460 nm~620 nm. The full width at half maximum （FWHM） of InP/ZnS QDs with blue， green and red band were about 52 nm， 52 nm and 59 nm， respectively， and the average particle sizes were 3.05 nm， 3.32 nm and 3.44 nm， respectively. The fluorescence lifetime were 59.41 ns， 61.44 ns and 68.08 ns， respectively. In addition， the patterned InP/ZnS quantum dots photoresist （QDPR） film was prepared by the laser-assisted route. With the assistance of blue OLED and 5.5 pairs distributed Bragg reflector （DBR） structures， the CCE of color conversion based InP/ZnS QDPR film could reach 20.9% and the color coordinate could change from （0.22， 0.30） to （0.29， 0.63）. Based on these results， InP/ZnS QDPR film is potentially useful for the fabrication of light emitting devices in the fields of lighting and display.