11. A non-transitory computer-readable storage medium having stored thereon instructions that, when executed by at least one processor of a communication device, cause the communication device to perform a text coding and decoding method, the text coding and decoding method comprising: creating a coding table for indexing each character coded in a five-bit first string; receiving text data, and convert each upper case letter of the text data into a lower case letter; determining the five-bit first string of each character of the text data according the coding table; lining up the determined five-bit first strings in sequence to form an array; dividing the array into eight-bit second strings; supplementing a last string with preset bits to form an eight-bit string when the last string is less than eight bits; embedding a preset indicatory code in a head of the array; embedding a data coding scheme and a length of the array in a header of the array to code the text data; transmitting the array to a receiver that communicates with the communication device; receiving the array from a sending device that communicates with the communication device, wherein the communication device saves the coding table for indexing each character coded in the five-bit first string; determining whether the array is coded in the data coding scheme according to the preset indicatory code of the array, wherein the data coding scheme codes the array by the coding table saved in the communication device; converting the array into the five-bit first strings according to the data coding scheme embedded in the header of the array when the array is coded by the data coding scheme; indexing the coding table for determining the character of each string; and displaying a text data corresponding to the determined character of each string on a monitor of the communication device.
14. The storage medium of claim 11 , wherein the data coding and decoding scheme is an eight-bit coding scheme, and the length of the array is a number of the characters of the text data.