A downlink pilot transmitting method by an evolved Node B, eNB, comprising: dividing, by the evolved Node B, resources for transmitting a downlink Channel State Information-Reference Signal, CSI-RS, into multiple resource groups, wherein the resources comprise any one or any combination of subframes, ports and Physical Resource Block, PRB, pairs; respectively configuring a pilot transmitting parameter of each resource group and/or respectively reaching an agreement with a terminal on the pilot transmitting parameter of each resource group, by the evolved Node B; and respectively transmitting, by the evolved Node B, the downlink CSI-RS in the multiple resource groups according to the pilot transmitting parameter configured and/or as agreed with the terminal for each resource group; when the resources are multiple time-domain subframes for transmitting the downlink CSI-RS, the divided multiple resource groups are subframe groups, and each subframe group comprises one or more subframes; the pilot transmitting parameter comprises one or more of the following parameters: a time-frequency resource density and time-frequency resource position occupied by the downlink CSI-RS, number of ports of the downlink CSI-RS, port Identities, IDs, of the downlink CSI-RS, transmitting power of the downlink CSI-RS; when the resources are multiple ports for transmitting the downlink CSI-RS, the divided multiple resource groups are port groups, and each port group comprises one or more ports; the pilot transmitting parameter comprises one or more of the following parameters: a density of time-frequency resources occupied by the downlink CSI-RS corresponding to a port, a density of occupied PRB pairs corresponding to the port, positions of the occupied PRB pairs corresponding to the port, a transmitting density in each PRB pair corresponding to the port, a transmitting position in each PRB pair corresponding to the port, a transmitting period and offset corresponding to the port if the downlink CSI-RS is a periodical pilot, number of repeated transmitting times and transmitting time-domain position corresponding to the port if the downlink CSI-RS is a non-periodical pilot, transmitting power of the downlink CSI-RS; when the resources are multiple frequency-domain PRB pairs for transmitting the downlink CSI-RS, the divided multiple resource groups are Resource Block, RB, groups, and each RB group comprises one or more PRB pairs; the pilot transmitting parameter comprises one or more of the following parameters: a transmitting resource density of the downlink CSI-RS in an RB group, a transmitting resource position of the downlink CSI-RS in the RB group, number of transmitting resource ports of the downlink CSI-RSs in the RB group, port IDs of transmitting resource ports of the downlink CSI-RSs in the RB group, transmitting power of the downlink CSI-RS. dividing, by the evolved Node B, resources for transmitting a downlink Channel State Information-Reference Signal, CSI-RS, into multiple resource groups, wherein the resources comprise any one or any combination of subframes, ports and Physical Resource Block, PRB, pairs; respectively configuring a pilot transmitting parameter of each resource group and/or respectively reaching an agreement with a terminal on the pilot transmitting parameter of each resource group, by the evolved Node B; and respectively transmitting, by the evolved Node B, the downlink CSI-RS in the multiple resource groups according to the pilot transmitting parameter configured and/or as agreed with the terminal for each resource group; when the resources are multiple time-domain subframes for transmitting the downlink CSI-RS, the divided multiple resource groups are subframe groups, and each subframe group comprises one or more subframes; the pilot transmitting parameter comprises one or more of the following parameters: a time-frequency resource density and time-frequency resource position occupied by the downlink CSI-RS, number of ports of the downlink CSI-RS, port Identities, IDs, of the downlink CSI-RS, transmitting power of the downlink CSI-RS; when the resources are multiple ports for transmitting the downlink CSI-RS, the divided multiple resource groups are port groups, and each port group comprises one or more ports; the pilot transmitting parameter comprises one or more of the following parameters: a density of time-frequency resources occupied by the downlink CSI-RS corresponding to a port, a density of occupied PRB pairs corresponding to the port, positions of the occupied PRB pairs corresponding to the port, a transmitting density in each PRB pair corresponding to the port, a transmitting position in each PRB pair corresponding to the port, a transmitting period and offset corresponding to the port if the downlink CSI-RS is a periodical pilot, number of repeated transmitting times and transmitting time-domain position corresponding to the port if the downlink CSI-RS is a non-periodical pilot, transmitting power of the downlink CSI-RS; when the resources are multiple frequency-domain PRB pairs for transmitting the downlink CSI-RS, the divided multiple resource groups are Resource Block, RB, groups, and each RB group comprises one or more PRB pairs; the pilot transmitting parameter comprises one or more of the following parameters: a transmitting resource density of the downlink CSI-RS in an RB group, a transmitting resource position of the downlink CSI-RS in the RB group, number of transmitting resource ports of the downlink CSI-RSs in the RB group, port IDs of transmitting resource ports of the downlink CSI-RSs in the RB group, transmitting power of the downlink CSI-RS.