Implementing roaming call to foreign intelligent client

The invention claims a method for realizing different intelligent roaming user calling, at least comprising the following steps: a different. gateway mobile switching centre causing the transmission routing information (SRI) together to ownership register (HLR), request for obtaining called roaming number; b.HLR loop comprises a virtual roaming number to different GMSC, different GMSC to act according to the virtual roaming for call continue intelligent platform service delivery point (SSP); thethe virtual roaming number of c.SSP a preset address message (IAI) and causing the SRI operation of HLR; front d.HLR discovers the SRI operation are provided, the virtual roaming number of assigns, the leads user value of the roaming number communication, and number and user corresponding user information signing (CSI) is loop; SSPe.SSP by leads obtaining user intelligent CSI based on service phone, a call continue access of mobile switching centre (VMSC) of the called party is in. Using the method is connected to consummate intelligent mobile network the charging system.