A thermal control intelligent protection method for a generating unit, characterized by the following steps: Step 1: selecting one of a plurality of measurement signals of thermal parameters in a present control system as a main signal and selecting other measurement signals of thermal parameters associated with the thermal parameter of the main signal as evidence signals; connecting signals of a present protection system in said present control system to an intelligent judgement module; said intelligent judgement module at least comprises a delay unit, an intelligent judgement unit and an instruction processing unit; Step 2: simultaneously sending said main signal to the present protection system of said present control system and said intelligent judgement unit; sending said evidence signals to said intelligent judgement unit; Step 3: when said present protection system does not send a protection instruction, said intelligent judgement unit utilizes the evidence signals to verify if said main signal is true or false; if said main signal is verified as false, said intelligent judgement unit outputs a prompt signal "refuse-operation of the protection" to said instruction processing unit; after receiving said prompt signal "refuse-operation of the protection", said instruction processing unit, according to a content of said main signal, outputs said protection instruction corresponding to said main signal to an execution circuit; Step 4: when said present protection system sends said protection instruction according to said main signal, said protection instruction firstly enters into a delay unit, and said delay unit is designed to delay an output of said protection instruction; after a delay is ended, a protection instruction is sent to said instruction processing unit; at the same time with the main signal being processed by the present protection system through the delay unit,said intelligent judgement unit utilizes said evidence signals to verify if said main signal is true or false; if said main signal is verified as false, said intelligent judgement unit outputs a prompt signal "maloperation of the protection" to said instruction processing unit, and at the same time an output of said protection instruction received by said instruction processing unit from said present protection system is terminated; if said main signal is verified as true, said intelligent judgement unit outputs a prompt signal "correct protection action" to said instruction processing unit; said instruction processing unit outputs said protection instruction from said present protection system to the execution circuit. Step 1: selecting one of a plurality of measurement signals of thermal parameters in a present control system as a main signal and selecting other measurement signals of thermal parameters associated with the thermal parameter of the main signal as evidence signals; connecting signals of a present protection system in said present control system to an intelligent judgement module; said intelligent judgement module at least comprises a delay unit, an intelligent judgement unit and an instruction processing unit; Step 2: simultaneously sending said main signal to the present protection system of said present control system and said intelligent judgement unit; sending said evidence signals to said intelligent judgement unit; Step 3: when said present protection system does not send a protection instruction, said intelligent judgement unit utilizes the evidence signals to verify if said main signal is true or false; if said main signal is verified as false, said intelligent judgement unit outputs a prompt signal "refuse-operation of the protection" to said instruction processing unit; after receiving said prompt signal "refuse-operation of the protection", said instruction processing unit, according to a content of said main signal, outputs said protection instruction corresponding to said main signal to an execution circuit; Step 4: when said present protection system sends said protection instruction according to said main signal, said protection instruction firstly enters into a delay unit, and said delay unit is designed to delay an output of said protection instruction; after a delay is ended, a protection instruction is sent to said instruction processing unit; at the same time with the main signal being processed by the present protection system through the delay unit,said intelligent judgement unit utilizes said evidence signals to verify if said main signal is true or false; if said main signal is verified as false, said intelligent judgement unit outputs a prompt signal "maloperation of the protection" to said instruction processing unit, and at the same time an output of said protection instruction received by said instruction processing unit from said present protection system is terminated; if said main signal is verified as true, said intelligent judgement unit outputs a prompt signal "correct protection action" to said instruction processing unit; said instruction processing unit outputs said protection instruction from said present protection system to the execution circuit.