As importance of ethical management is reviewed due to unethical management of Korean corporations, this research proposes an specific alternatives based on Siemens ethical management, which is made on ethical ecosystem model, for Korean corporations to practice sustainable ethical management. This research analyzes how Siemens overcame crisis after not devoting to ethical management, and what steps they took to practice ethical management as their prior value. The research intensively analyzed what Siemens reflects on stage of directing ethical management, which are opinions of outside stakeholder and thorough practice plan, and rapidly improved evaluations from outside and inside after practicing ethical management. Basis on analysis, Siemens's ethical management ecosystem based on SPICE-CPNT model, viewed with platform strategy that connects Siemens's ethical management system to corporation's ecological evolution. As a result, ethical management is systematically connected with corporation's visions and practical strategies to achieve those visions, and only if it is connected as main value among society, outside partnership, stockholders, clients, and employees, the management result can be positively connected to corporation's evolution and advancement.