A software development system according to the present invention comprises a business component storage layer for storing at least one business standard component of a program; a business component setting layer for setting attribute information of each business standard object, including object type, operating method, execution condition, execution sequence and database (DB) connection information; an application program execution layer for operating and controlling the object in the business component storage layer by the attribute information of the objects set by the user, and performing comparison, execution or calculation according to logic defined in script language; and an environment abstraction layer for controlling information technology (IT) infrastructure including an operating system of a computer, a central processing unit (CPU), a memory, a database management system (DBMS), network and display apparatus.