The present invention relates to a mobile communication device which comprises a temperature detection unit for detecting the object to be detected, a temperature data analysis processing unit of performing analysis and determination for temperature data provided by the temperature detection unit, and a display unit of displaying temperature data determined by the temperature data analysis processing unit. Accordingly, the present invention mainly integrates the temperature detection element in the mobile communication device, and generates a temperature data after detecting the environmental temperature status by the temperature detection unit. So that the temperature data analysis processing unit processes and determines the temperature state of the object to be detected according to measured temperature data and displays different kinds of data conversion and warm tips provided for the users reference on the display unit. Not only different conditions of temperature measurement requirements are provided to the user but also the efficacy of displaying temperature distribution diagram of the temperature measurement instrument can be simultaneously achieved.