A QoS guaranteed resource management system architecture is proposed. The theoretical analysis demonstrates that this system architecture can well adapt to dynamic behavior of resources; Secondly, service resource co-allocation problem is formulated as MMKP (multiple-choice multiple-dimension knapsack problem) and an exact algorithm RA_BBLP and a heuristic algorithm RA_MHEU are both presented. Experimental results show that RA_BBLP which ensures the optimal solution can be used as reference of other algorithms. However, RA_MHEU can obtain near-optimal solution at high speed, which is an ideal service resource co-allocation algorithm.