A selecting and matching system for turbocharged diesel engine was developed using the mean value model of turbocharged diesel engines. The system can accomplish the work of selecting turbocharging solution, calculating relevant parameters and selecting the type of turbocharger. The software of this system was developed based on Visual C++ program language. Matching calculation was carried out on D6114 diesel engine and the calculating results matches well with the experiment results, which verified the accuracy of the calculating model and program.