Disclosed is a data base access method and system that can easily access a data base (DB) in a management information base (MIB) of a simple network management protocol (SNMP) or a common management information protocol (CMIP). The method includes making contents of the MIB into an MBean class where members of m_Attrs, m_AttrName, and m_AttrType including information of the MIB and member functions for accessing these members, and members of m_DBJob and m_ConditionClause for a data base (DB) work and member functions for accessing these members exist, extracting an MIB-based class by compiling the MBean class, inputting an MIB-related instruction to use the extracted MIB-based class, performing a corresponding operation such as a data readout from the MIB if the instruction does not refer to a DB operation, loading the extracted MIB-based class and a smart view DB class SvDB including common information required for a DB access if the instruction refers to the DB operation, and accessing the DB by obtaining a DB name and instruction name and type from the MIB-based class. According to the method, the DB can be easily accessed without changing a DB API even if the MIB is changed.