Printing system and printing method for portable communication device

A printing method, comprising steps of:

• (a) providing a portable communication device, a printing device and plural transmission channels, wherein said transmission channels are selectively in communication with said portable communication device and said printing device;
• (b) allowing said portable communication device to judge whether plural transmission channels between said portable communication device and said printing device are available, and setting priority values of said plural transmission channels, wherein said priority value of each transmission channel includes a parameter indicating whether the communication between said portable communication device and said printing device is established, a data transmission speed of said transmission channel, data transmission cost of said transmission channel, data transmission stability of said transmission channel, and a combination thereof;
• (c) automatically selecting one of said plural transmission channels as a priority transmission channel according to said priority values of said transmission channels, and transmitting said to-be-printed data from said portable communication device to said printing device through said priority transmission channel;
• and
• (d) performing a printing task after said to-be-printed data is received by said printing device.