Provided are an information processing method, apparatus and system. The method includes acquiring first information; and performing contention-based access and transmitting a sounding reference signal (SRS) according to the first information, where the first information includes at least one of the followings: a frame structure, a listen-before-talk (LBT) execution position, a SRS transmission position and dedicated indication signaling. The present disclosure solves a collision problem that occurs when a LBT detection position and a SRS transmission position are both on a last OFDM symbol of a subframe in the related art and achieves effects of improving a probability that a UE accesses a channel and increasing SRS transmission opportunities.