Abstract: The issue of honesty in engineering shares some common aspects with that in scientific research，but there are many different aspects between them. The characteristics of engineering test are different from those of scientific experiment，so dishonest behaviors are prone to occur in engineering test，and the outcomes are more serious. Besides，the issue of honesty which engineers face is closely related with the business operating model of engineering，the role of expert witness in courts and the role of advisers in public policy making which engineers play，and it is not or rarely discussed in scientific integrity.