Abstract: The present invention relates to a grilling device, especially relates to a wireless food temperature detecting device, comprising: a temperature detecting unit, a controlling unit disposed on the processor of grilling device; said temperature detecting unit has a temperature detecting stick for inserting into the food which is prepared to be fried or roasted, and has a wireless emitting element electrically connected to said temperature detecting stick; said controlling unit has a wireless receiving element; said temperature detecting unit is controlling by signals transmitted between said wireless emitting element and said wireless receiving element. Compared to the conventional technique, the present invention controls the doneness of food by detecting the inner temperature of food. It is greatly convenient for the consumers to operate.