ABSTRACT ¡§Management by objectives¡¨ means proceeding management in accordance with objects. Several years ago, many advanced enterprises in America, Europe & Japan have led this into their management system and got positive result. It not only strengthens enterprises system, raises income, enhances staff¡¦s ability & skill but also focus staff¡¦s identification. Now, a succession of enterprises and government department in Taiwan are carrying out this management system to improve administration efficiency and enhance their competitive ability. ¡§Management by objectives¡¨ is a synthetic and overall management system, which combines corporate mission, management concept, vision, strategy, objective and all the other company resources and reach expected objective by the circle of P(plan), D(do), C(check) and A(action) . This research is adopted case study method. We survey via questionnaires to realize how manager maps out corporate mission, management concept, vision & strategy; how each department spreads out its objective, plan, efficiency & improvement policy and how staff reaches his personal objects & efficiency. After researching, we found carrying out ¡§Management by objectives¡¨ can reach the following effects: 1. Making company objectives more definite: 2. Strengthening communication & coordination between departments; 3. Making staff with more self-confidence, self-reliance and self-motion; 4. Raising staff¡¦s identification and making efficiency judging fair; 5. Focusing team¡¦s conception; 6. Developing and cultivating staff¡¦s ability. Followings are my suggestions for continued research: 1. Enlarging industrial survey range with statistics; 2. Expanding ¡§Management by objectives¡¨ into management by efficiency and budget. Keyword: Management by objectives; Circle of P-D-C-A