The present invention relates to a digital communication system which uses the pilot signal conveying technique and a method thereof, especially to a wireless transmitting method and an apparatus thereof. According to the invention, a first modulation mode is used for modulating the information data and generating a first code element flow, wherein the first modulation mode comprises the signal points which are configured in the line I=Q or the line I=-Q, and the signal point comprises the signal point which has maximum signal point vibration amplitude; regularly inserting the signal point pilot frequency code elements which are configured I axis or Q axis have vibration amplitude larger than that of the largest signal point of the first modulation mode in the IQ surface for generating a second code element flow; and transmitting the second code element flow.