The development process of the temperature monitoring technology under the intelligent well completion (IWC)conditions，especially the latest research works of the theoretical models for the temperature monitoring technology，provides reference for further application and in-depth theoretical research of the downhole temperature monitoring technology.The mainstream temperature sensors currently used in oilfields include the permanent downhole electronic pressure/temperature sensors and distributed optical fiber temperature sensors. Due to the strong environmental adaptability and the distributed characteristics of temperature data，the distributed optical fiber temperature sensors have been more widely used. Six major application for the temperature monitoring technology include：gas lift monitoring，flow profile interpretation，gas-water coning diagnostics，heavy oil thermal recovery monitoring，stimulation monitoring and evaluation，and reservoir property inversion analysis and so on. The theoretical research works showed the rapid progresses in stimulation monitoring and evaluation as well as reservoir property inversion analysis. The transient temperature analysis has been established gradually.The temperature models for multi-stage，multi-cluster horizontal fractured well have also been improved greatly based on the conventional temperature model in fractured wells，which could be used for both temperature simulation and fracturing evaluation inversion.