This paper proposes a distributed relay and modulation and coding scheme (MCS) selection in wireless cooperative relaying networks where the adaptive modulation and coding (AMC) scheme is applied.First-order finite-state Markov channels (FSMCs) are used to model the wireless channels and make prediction.The objective of the relay policy is to select one relay and MCS among different alternatives in each time-slot according to their channel state information (CSI) with the goal of maximizing the throughput of the whole transmission period.The procedure of relay and MCS selection can be formulated as a discounted Markov decision chain,and the relay policy can be obtained with recent advances in stochastic control algorithms.Simulation results are presented to show the effectiveness of the proposed scheme.