1. A computer initialization system comprising: an initialization data generator including a task database in which task descriptions for initializing a computer are specified related with task IDs, and an initialization database in which initialization data descriptions for initializing said computer are stored related with initialization data IDs; wherein said initialization data generator comprises: a data acquisition means which takes input of a computer ID for identifying said computer and task data for initialization of said computer, wherein said task data specifies said task IDs for identifying said task descriptions, task ordering for initialization task, and said initialization data IDs for identifying initialization data of initialization-software to be installed into said computer; and an initialization data generation means which reads said task descriptions and said initialization data descriptions from said task database and said initialization database according to said task ordering, by using said task IDs, said task ordering and said initialization data IDs, and generates said initialization data for initializing said computer according to said data descriptions.