In discussing scientific and ethical issues,problems arising from the proposal to formulate ethical norms for scientists are useful ones of professional ethics framework.Is science a career? If the answer is yes,then should the professional ethics of science be autogenous or allogenous? This paper clarifies the very nature of "good" professional ethics in scientific world.It is feasible to consider science as a public product of imparting knowledge and explaining the diversity of natural world,but we can never ignore to give scientific response to basic philosophical questions such as human desires.