A method for terminal access and management in cloud computing, comprising: making a terminal with a management and control module access a bidirectional data transmission network and taking the terminal as a node in a system; searching, by the node, for a first responding control node or agent control node in the system, whereby nodes in the system each have a level and connecting, by the node, with a network management server via an agent control node connected to a found control node or via a found agent control node; and collecting, by a management and control module of a node at each level in the system, running information of the terminal, and reporting, by the management and control module of the node at each level, the running information level by level, and performing, by a nearest super-ordinate node, a management operation; wherein the agent control node is a control node at the topmost level in the system and is connected with the network management server via a controlled connection; wherein a controlled node is a node in the system connected with a control node or an agent control node via a controlled connection, the controlled node being equipment that needs to be managed in the system which receives and executes a management instruction from a higher level, and returns a result of the execution or returns warning information of an execution failure; wherein the management operation comprises a load adjustment operation or a transfer management operation; wherein the load adjustment operation is that: a heavily loaded control node selects a least loaded controlled node, promotes the least loaded controlled node to be a control node, and transfers management and control power over a certain proportion of controlled nodes to the promoted node; and the transfer management operation is that: a control node selects a least loaded controlled node, promotes the least loaded controlled node to be a control node, and transfers management and control power over all controlled nodes to the promoted node. making a terminal with a management and control module access a bidirectional data transmission network and taking the terminal as a node in a system; searching, by the node, for a first responding control node or agent control node in the system, whereby nodes in the system each have a level and connecting, by the node, with a network management server via an agent control node connected to a found control node or via a found agent control node; and collecting, by a management and control module of a node at each level in the system, running information of the terminal, and reporting, by the management and control module of the node at each level, the running information level by level, and performing, by a nearest super-ordinate node, a management operation; wherein the agent control node is a control node at the topmost level in the system and is connected with the network management server via a controlled connection; wherein a controlled node is a node in the system connected with a control node or an agent control node via a controlled connection, the controlled node being equipment that needs to be managed in the system which receives and executes a management instruction from a higher level, and returns a result of the execution or returns warning information of an execution failure; wherein the management operation comprises a load adjustment operation or a transfer management operation; wherein the load adjustment operation is that: a heavily loaded control node selects a least loaded controlled node, promotes the least loaded controlled node to be a control node, and transfers management and control power over a certain proportion of controlled nodes to the promoted node; and the transfer management operation is that: a control node selects a least loaded controlled node, promotes the least loaded controlled node to be a control node, and transfers management and control power over all controlled nodes to the promoted node.