This research presents a flexible temperature sensor based on Mo₁₋ₓWₓS₂ alloys, capable of detecting temperature changes on a microsecond scale. The sensor uses ultrathin, continuous Mo₁₋ₓWₓS₂ alloy films fabricated via inkjet printing and thermal annealing. The sensor exhibits a broad working temperature range (20–823 K on polyimide and 1,073 K on flexible mica) and a record-low response time of about 30 μs. It can detect instantaneous temperature variations caused by contact with liquid nitrogen, water droplets, and flames. The sensor array provides spatial mapping of arbitrary shapes, heat conduction, and cold traces even under bending deformation. The alloy-based sensors demonstrate high sensitivity, fast response, low detection limit, and excellent robustness over a wide temperature range. They maintain superior performance under harsh conditions such as immersion in liquid nitrogen, exposure to fire, and rapid thermal shock. The sensors enable the instantaneous detection of various temperature signals induced by liquid nitrogen, water droplets, and flames. The alloy films have a tunable composition, allowing for precise control of electrical properties. The sensors show high sensitivity and fast response, with a temperature resolution down to 0.02 K and reliable performance over 100 heating/cooling cycles. The sensor array can accurately identify arbitrary shapes, record heat conduction, and monitor object movement. The sensors are flexible and can be used in extreme environments, such as outer space, for temperature monitoring. The study demonstrates the potential of Mo₁₋ₓWₓS₂ alloys for flexible temperature sensing applications.This research presents a flexible temperature sensor based on Mo₁₋ₓWₓS₂ alloys, capable of detecting temperature changes on a microsecond scale. The sensor uses ultrathin, continuous Mo₁₋ₓWₓS₂ alloy films fabricated via inkjet printing and thermal annealing. The sensor exhibits a broad working temperature range (20–823 K on polyimide and 1,073 K on flexible mica) and a record-low response time of about 30 μs. It can detect instantaneous temperature variations caused by contact with liquid nitrogen, water droplets, and flames. The sensor array provides spatial mapping of arbitrary shapes, heat conduction, and cold traces even under bending deformation. The alloy-based sensors demonstrate high sensitivity, fast response, low detection limit, and excellent robustness over a wide temperature range. They maintain superior performance under harsh conditions such as immersion in liquid nitrogen, exposure to fire, and rapid thermal shock. The sensors enable the instantaneous detection of various temperature signals induced by liquid nitrogen, water droplets, and flames. The alloy films have a tunable composition, allowing for precise control of electrical properties. The sensors show high sensitivity and fast response, with a temperature resolution down to 0.02 K and reliable performance over 100 heating/cooling cycles. The sensor array can accurately identify arbitrary shapes, record heat conduction, and monitor object movement. The sensors are flexible and can be used in extreme environments, such as outer space, for temperature monitoring. The study demonstrates the potential of Mo₁₋ₓWₓS₂ alloys for flexible temperature sensing applications.