AbstractTemporally and spatially resolved profiles of electron temperatures in the HT-7 superconducting tokamak are measured during a single shot with a soft X-ray spectrometer system. The plasma soft X-ray emission (2–30 keV) was measured by the Si(Li) detector system with an energy resolution of 300 eV. This diagnostic system provides a useful tool to obtain the HT-7 electron temperature profiles with good time and spatial resolutions.