<p>This study presents a robust technique for the direct measurement of surface temperature and heat flux in high-temperature environments, overcoming traditional limitations such as limited sensor installation space. By embedding thermocouple sensors near the surface within a ductile metal block, the method minimizes thermal stress and enhances measurement accuracy. Heat flux is calculated from the measured temperature using a one-dimensional transient heat conduction approach, thereby reducing reliance on indirect computational models. The technique was experimentally validated with water impinging jet cooling on a block heated to 600 °C and 900 °C, where the embedded sensors successfully recorded spatial and temporal variations in heat flux, achieving a maximum of 8.3 MW/m². This approach demonstrates high-resolution, stable operation suitable for industrial conditions. Its reliability and applicability for process evaluation, heat exchanger optimization, and advanced cooling system development mark a significant advancement over conventional indirect methods, particularly in harsh thermal environments where accurate, real-time data is critical.</p>