In the recent years, ¡§Atypical Employment¡¨ has been accepted by most of the enterprises. The enterprises of the software service industry use atypical employment originally from the design theory of Shamrock Organization to seek the professional technical manpower. This research is to find out the determinants of hiring contracted workers or dispatched workers based on the atypical employee. The results are as follows: I. The organizational background: 1. The larger the scale of organization is, the better the possibility of hiring the dispatched workers of the atypical employment is. 2. The software industry is more likely to hire the contracted workers of the atypical employment than other service industries are. II. The determinants of the enterprises hiring the atypical employment: 1. The higher the enterprises pay the salary packages, the better the possibility of the use of dispatched workers is. 2. The higher the employee training costs, the better the possibility of the use of the contracted workers is. 3. The higher the job needs the degree of professional skill, the better the possibility of the use contracted workers is. 4. The higher the job needs the special techniques, the better the possibility of the use of the dispatched workers is. 5. The more the enterprises have products in diversity, the better the possibility of the use of the dispatched workers is. 6. The more the flexibility of the job arrangement is, the better the possibility of the use contracted worker is. III. The changeable factors of manpower demand: 1. The higher the degree of the demand of manpower change is, the better the possibility of hiring dispatched workers.