Communication method of hiding privacy information and system thereof

A communication system of hiding privacy information for communication between a first mobile device comprising a first communication application program and a second mobile device comprising a second communication application program, the communication system comprising:

• a memory storing a plurality of first identification codes and a plurality of second identification codes corresponding to the plurality of first identification codes;
• a display interface displaying a master identifying unit and a slave identifying unit, the master identifying unit and the slave identifying unit comprising a first identification code of the plurality of first identification codes and a second identification code of the plurality of second identification codes, wherein the display interface is applied to the first mobile device or the second mobile device for performing a detection, and the first mobile device acquires the first identification code and adds the first identification code into the first communication application program, or the second mobile device acquires the second identification code and adds the second identification code into the second communication application program;
• and
• a connection processor receiving a communication request comprising the first identification code or the second identification code, and establishing a communication link from the first communication application program to the second communication application program or from the second communication application program to the first communication application program according to the second identification code or the first identification code;
• wherein when the first mobile device detects the master identifying unit at the first time, the first mobile device uploads an identification code to the connection processor, and the connection processor uses the first identification code associated with the identification code to establish the communication link.