Indication method and system for controlling signal channel transformat

The invention discloses an indicating method of control channel transmission format which presets control channel transmission format indication (CCFI). The method further comprises: extracting the system transmission parameter theta according to the transmission characteristic of current wireless communication system; establishing mapping relation and calculating n value using n=psi(CCFI, theta) according to the CCFI and theta; packaging control signaling into subframe and according to the n value and sending to the terminal after base station Node B establishes connection to the terminal, and informing the n value to the terminal through the CCFI channel at the same time; the terminal acquiring the detailed transmission format information of the control signaling in the channel according to the n value; extracting the control singling from the subframe; and reading data according to the resource position information in the control signaling. The invention further discloses a control channel transmission format indicating system. The method and system in the invention can achieve the control channel transmission format indication simply and efficiently.