I write this book concerns whether labors abnormal long time working hours factor which can influence society economic growth and raises productivity in long time. Why do I choose to research this topic? Because I discovered many employers need labors to increase working hours to work often, such as China , Hong Kong etc. developing countries. Although, they feel this method will help them to reduce to spend salary or wage expenditure to employ extra full time labors to assist them to achieve to raise aim of productivity. But in fact, they neglect to consider other disadvantages to cause their labors to feel tiring and unfair treatment and reduce their stanrdard of life, due to their labors will not increase salary or wage very much and who also need to work very long hours per working day. Hence, I shall indicate evidences to prove why abnormal work hours method can only raise productivity in the short term, but this method can not raise productivity in the long term and it can also influence overall society economic decline and it can also influence labors' standard of life to be poor. In the final, I shall also recommend how employers, such as Hong Kong and China employers how to change their methods to achieve to raise their productivity in the long term. This book is suitable to any employers to read when who have interest to learn how to raise their workers' productvity in the long term.