An exemplary wireless transmission display system includes a signal generating apparatus and at least one display apparatus. The signal generating apparatus receives a display data represented in a first data format and converts the display data to be represented in a second data format. Then, the display data represented in the second data format is transmitted to the display apparatus in wireless manner. The display apparatus receives the display data represented in the second data format and performs a display directly according to the display data represented in the second data format without converting the second data format into any other data format. Moreover, a wireless transmission displaying method is also provided.