The temperature field is a common condition-monitoring parameter that is widely used to monitor the condition of large industrial equipment. The schlieren method is an effective flow-field visualization method to measure the spatial temperature field. The traditional schlieren method rebuilds the spatial refractive index field by directly measuring the light deflection angle and then calculating the temperature field. However， the light deflection angle is generally very small， and direct measurements produce large measurement errors. A method that uses interference fringes to amplify the light deflection angle is proposed， effectively improving the measurement accuracy of the schlieren technique. First， interference fringes were formed using a measuring laser that passes through a double slit to replace the random speckle pattern of the traditional schlieren method. When the fringe generated by interference fringes crosses the nonuniform temperature space， the fringe offset was measured by visual measurement， and the light deflection angle was calculated based on the offset. Next， the distribution of the spatial refractive index field was calculated using the Abel inverse transformation method to obtain the spatial temperature field. Finally， the effectiveness and measurement accuracy of the proposed method were verified experimentally using simulation. The experimental results showed that the temperature field reconstruction error induced in our method decreased by approximately 30% compared with the error induced in the traditional schlieren method. The proposed interference fringe schlieren method effectively improves the accuracy of schlieren measurement and expands the application range of schlieren temperature measurement.