A method for admission in connected mode comprising: • determining, by a wireless network device, a throughput rate that can be obtained by a wireless multimode terminal in a wireless network to which the wireless network device belongs (step 201); and • sending, by the wireless network device, the determined throughput rate to a decision device being an independent network device independent of or located in the wireless network device, • determining, by the decision device, according to the throughput rate, a wireless network that is suitable to be accessed by the wireless multimode terminal in connected mode (step 202), • wherein the wireless network device is an evolved NodeB eNB, the wireless network to which the wireless network device belongs is Long Term Evolution LTE, and the determining, by the eNB, the throughput rate that can be obtained by the wireless multimode terminal in LTE comprises: ∘ determining, by the eNB, a signal to interference plus noise ratio SINR of the wireless multimode terminal according to reference signal received quality RSRQ of the wireless multimode terminal and a resource block RB utilization rate of a first cell to be accessed by the wireless multimode terminal, wherein the first cell is a cell of the eNB; ∘ determining, by the eNB, a transport block size index TBS_INDEX and transmission efficiency of the wireless multimode terminal according to the SINR of the wireless multimode terminal; and ∘ determining, by the eNB according to a load status parameter of the eNB, and the TBS_INDEX and the transmission efficiency of the wireless multimode terminal, the throughput rate that can be obtained by the wireless multimode terminal in the LTE. • determining, by a wireless network device, a throughput rate that can be obtained by a wireless multimode terminal in a wireless network to which the wireless network device belongs (step 201); and • sending, by the wireless network device, the determined throughput rate to a decision device being an independent network device independent of or located in the wireless network device, • determining, by the decision device, according to the throughput rate, a wireless network that is suitable to be accessed by the wireless multimode terminal in connected mode (step 202), • wherein the wireless network device is an evolved NodeB eNB, the wireless network to which the wireless network device belongs is Long Term Evolution LTE, and the determining, by the eNB, the throughput rate that can be obtained by the wireless multimode terminal in LTE comprises: ∘ determining, by the eNB, a signal to interference plus noise ratio SINR of the wireless multimode terminal according to reference signal received quality RSRQ of the wireless multimode terminal and a resource block RB utilization rate of a first cell to be accessed by the wireless multimode terminal, wherein the first cell is a cell of the eNB; ∘ determining, by the eNB, a transport block size index TBS_INDEX and transmission efficiency of the wireless multimode terminal according to the SINR of the wireless multimode terminal; and ∘ determining, by the eNB according to a load status parameter of the eNB, and the TBS_INDEX and the transmission efficiency of the wireless multimode terminal, the throughput rate that can be obtained by the wireless multimode terminal in the LTE. ∘ determining, by the eNB, a signal to interference plus noise ratio SINR of the wireless multimode terminal according to reference signal received quality RSRQ of the wireless multimode terminal and a resource block RB utilization rate of a first cell to be accessed by the wireless multimode terminal, wherein the first cell is a cell of the eNB; ∘ determining, by the eNB, a transport block size index TBS_INDEX and transmission efficiency of the wireless multimode terminal according to the SINR of the wireless multimode terminal; and ∘ determining, by the eNB according to a load status parameter of the eNB, and the TBS_INDEX and the transmission efficiency of the wireless multimode terminal, the throughput rate that can be obtained by the wireless multimode terminal in the LTE.