A task tracking method of an Evolved Universal Mobile Telecommunication System, UMTS, Radio Access Network, E-UTRAN, system, characterized by comprising: creating a message, wherein the message carries multiple trace activation information elements, IEs, and each IE carries parameters of multiple tasks for tracking a same user; and sending the message to an Evolved NodeB, eNodeB, and the eNodeB creating the multiple tasks to track the user according to the parameters carried in the multiple IEs, wherein carrying the parameters of the multiple tasks for tracking the same user in the message comprises: setting multiple trace activation IEs in the message; each trace activation IE comprises: parameters of one task of the multiple tasks; and an IsLastRecord field is configured to indicate whether a trace activation IE carrying the IsLastRecord field is a last trace activation IE in the message; the method further comprising: the eNodeB receiving the message; the eNodeB decoding the message to acquire the multiple trace activation IEs, comprising: when decoding the message to acquire the current trace activation IE, the eNodeB judging whether a current trace activation IE is the last trace activation IE in the message according to the IsLastRecord field in the current trace activation IE; and if the current trace activation IE is not the last trace activation IE, continuing decoding the message to acquire a next trace activation IE, and continuing judging whether the next trace activation IE is the last trace activation IE, until the last trace activation IE is acquired by decoding the message; the eNodeB creating the multiple tasks according to parameters of the multiple trace activation IEs respectively; and the eNodeB executing the multiple tasks to track the user. creating a message, wherein the message carries multiple trace activation information elements, IEs, and each IE carries parameters of multiple tasks for tracking a same user; and sending the message to an Evolved NodeB, eNodeB, and the eNodeB creating the multiple tasks to track the user according to the parameters carried in the multiple IEs, wherein carrying the parameters of the multiple tasks for tracking the same user in the message comprises: setting multiple trace activation IEs in the message; each trace activation IE comprises: parameters of one task of the multiple tasks; and an IsLastRecord field is configured to indicate whether a trace activation IE carrying the IsLastRecord field is a last trace activation IE in the message; parameters of one task of the multiple tasks; and an IsLastRecord field is configured to indicate whether a trace activation IE carrying the IsLastRecord field is a last trace activation IE in the message; the method further comprising: the eNodeB receiving the message; the eNodeB decoding the message to acquire the multiple trace activation IEs, comprising: when decoding the message to acquire the current trace activation IE, the eNodeB judging whether a current trace activation IE is the last trace activation IE in the message according to the IsLastRecord field in the current trace activation IE; and if the current trace activation IE is not the last trace activation IE, continuing decoding the message to acquire a next trace activation IE, and continuing judging whether the next trace activation IE is the last trace activation IE, until the last trace activation IE is acquired by decoding the message; the eNodeB creating the multiple tasks according to parameters of the multiple trace activation IEs respectively; and the eNodeB executing the multiple tasks to track the user. the eNodeB receiving the message; the eNodeB decoding the message to acquire the multiple trace activation IEs, comprising: when decoding the message to acquire the current trace activation IE, the eNodeB judging whether a current trace activation IE is the last trace activation IE in the message according to the IsLastRecord field in the current trace activation IE; and if the current trace activation IE is not the last trace activation IE, continuing decoding the message to acquire a next trace activation IE, and continuing judging whether the next trace activation IE is the last trace activation IE, until the last trace activation IE is acquired by decoding the message; when decoding the message to acquire the current trace activation IE, the eNodeB judging whether a current trace activation IE is the last trace activation IE in the message according to the IsLastRecord field in the current trace activation IE; and if the current trace activation IE is not the last trace activation IE, continuing decoding the message to acquire a next trace activation IE, and continuing judging whether the next trace activation IE is the last trace activation IE, until the last trace activation IE is acquired by decoding the message; the eNodeB creating the multiple tasks according to parameters of the multiple trace activation IEs respectively; and the eNodeB executing the multiple tasks to track the user.