Method of transmitting key code of hot key from number pad

A method of transmitting a key code of a hot key from a number pad, applied in a number pad, and the number pad having at least one hot key, and a plurality of key code sets, and each key code set corresponding to one of the hot keys, and each key code set having a plurality of key codes, and the key codes being formed and edited according to a first key code conversion table in a first encoding format and a predetermined sequence, such that if any hot key of the number pad is pressed, the method will process a procedure comprising the steps of:

• the number pad transmitting all key codes of the corresponding key code sets of the pressed hot key according to a predetermined transmitting sequence of the key codes to an electronic device that is connected to the number pad;
• the electronic device reading each key code by the first encoding format;
• and
• the key codes being converted into characters corresponding to the first key code conversion table according to the first key code conversion table, and a plurality of characters being converted into characters corresponding to the second key code conversion table according to the second key code conversion table in a second encoding format, such that the electronic device produces an expected conversion result simply by reading the characters converted by the first key code conversion table and the characters converted by the first and second key code conversion tables.