This research article presents the design and fabrication of a flexible temperature sensor using Mo1-xWxS2 alloy films. The sensor is constructed via inkjet printing and thermal annealing, achieving a microsecond response time over an ultrawide temperature range (20 to 823 K on polyimide and up to 1,073 K on flexible mica). The sensors exhibit high sensitivity, fast response, and excellent robustness, making them suitable for detecting instantaneous temperature changes induced by liquid nitrogen, water droplets, and flames. The sensor array can also map spatial temperature variations, even under bending deformation, and has potential applications in extreme environments such as aerospace, oceans, and chemical industries. The study demonstrates the feasibility of using transition metal dichalcogenides for real-time thermal sensing and highlights the advantages of flexible sensors in harsh conditions.This research article presents the design and fabrication of a flexible temperature sensor using Mo1-xWxS2 alloy films. The sensor is constructed via inkjet printing and thermal annealing, achieving a microsecond response time over an ultrawide temperature range (20 to 823 K on polyimide and up to 1,073 K on flexible mica). The sensors exhibit high sensitivity, fast response, and excellent robustness, making them suitable for detecting instantaneous temperature changes induced by liquid nitrogen, water droplets, and flames. The sensor array can also map spatial temperature variations, even under bending deformation, and has potential applications in extreme environments such as aerospace, oceans, and chemical industries. The study demonstrates the feasibility of using transition metal dichalcogenides for real-time thermal sensing and highlights the advantages of flexible sensors in harsh conditions.