A mobile terminal, comprising a display screen and an assembling management module (a), wherein a plurality of the mobile terminals can be assembled into a single combined terminal device, each of the mobile terminals can selectively operate as a master in a master operating state and operate as a slave in a slave operating state, and the assembling management module (a) comprises: a state determination unit configured to cause the mobile terminal to selectively enter the master operating state or the slave operating state according to a state determination instruction; a display partitioning unit configured to, when the mobile terminal operates as the master, partition the display content of the master according to the display screen resource of individual said mobile terminals in the combined terminal device, to obtain a plurality of pieces of partitioned display data corresponding to the plurality of the mobile terminals in the combined terminal device, and send corresponding said partitioned display data to the slaves; a display switching unit configured to, in a case in which the mobile terminal acts as the slave, upon reception of the partitioned display data from the master, hide the current work task of the mobile terminal in the background for running, and display the received partitioned display data; a resource statistics unit configured to perform statistics on currently available resource information of the mobile terminal and send the available resource information to the master, in a case in which the mobile terminal acts as the slave; a resource allocation unit configured to partition the current work task of the master into a plurality of sub-tasks according to the available resource information of the slaves and send corresponding sub-tasks to the slaves, in a case in which the mobile terminal operates as the master; and a sub-task execution unit configured to execute the sub-task using the available resource according to the sub-task from the master, in a case in which the mobile terminal acts as the slave; wherein the available resource information comprises at least one of a CPU resource, a storage resource, a network resource and an electricity resource. a state determination unit configured to cause the mobile terminal to selectively enter the master operating state or the slave operating state according to a state determination instruction; a display partitioning unit configured to, when the mobile terminal operates as the master, partition the display content of the master according to the display screen resource of individual said mobile terminals in the combined terminal device, to obtain a plurality of pieces of partitioned display data corresponding to the plurality of the mobile terminals in the combined terminal device, and send corresponding said partitioned display data to the slaves; a display switching unit configured to, in a case in which the mobile terminal acts as the slave, upon reception of the partitioned display data from the master, hide the current work task of the mobile terminal in the background for running, and display the received partitioned display data; a resource statistics unit configured to perform statistics on currently available resource information of the mobile terminal and send the available resource information to the master, in a case in which the mobile terminal acts as the slave; a resource allocation unit configured to partition the current work task of the master into a plurality of sub-tasks according to the available resource information of the slaves and send corresponding sub-tasks to the slaves, in a case in which the mobile terminal operates as the master; and a sub-task execution unit configured to execute the sub-task using the available resource according to the sub-task from the master, in a case in which the mobile terminal acts as the slave; wherein the available resource information comprises at least one of a CPU resource, a storage resource, a network resource and an electricity resource.