I write this book concerns to explain whether what are the moral differences between scientists and businessmen and medical doctors. I give ideas to let scientists to know why who need to concern moral and ethic when they are carrying on their science research. I shall suppose different situations to let these scientists, such as physical, earth, plant, medicine, computer etc. My aim is to raise their judicious ability to judge whether who ought or ought not follow morality to do their scientific research in any situations as well as whether who will encounter what of challenges if who don’t follow the morality to do their research in the situation . I hope any scientists can learn how to deal their moral behavior to do correct scientific decision.