PURPOSE: To realize the batch collection of dump information on a work area, etc., by saving the dump information on a main memory and at the same time storing a subdump program into a system file.

CONSTITUTION: A circuit control part 6, an external input/output part 7 and a channel 8 are added to a terminal equipment 10 which is controlled by a CPU. A sub-CPU, a program storing part and a memory are added to the parts 6 and 7 as well as to the channel 8 respectively. Furthermore a system file 3 and a dump file 4 are added to an external file 11. Then the dump data parts 7-1 and 8-1 of the part 7 and the channel 8 are evolved to a main memory 1 via a sub-dump program. At the same time, a dump program which saves the dump information on the memory 1 into the file 4 is stored into a dump program storing part 2 with the sub-dump program kept stored in the file 3 respectively.