The researches applied theory of planned behavior(TPB) are enormously inpliemented.Also there are some researches with theory of planned behavior address training programs in organizations.Althougtht training programs are an important compotent in most of companies,little theoretical guidance is available for their implementation in information technology services industry This research proposes the behavior model originated from Ajzen¡¦s (1985)theory of planned behavior(TPB) to understand how employees¡¦ attitude, subject norm and perceived control behavior determinants of employees¡¦ behavior in training programs. Data were collected from a company of information service industry in Taiwan. The results indicate traning programs must be suitable and acceptable to employees, otherwise, it wouldn¡¦t change employee¡¦s attitude toward training programs even they have plenty of choices and opportunities. Personl attidute and subject norm predicts employees¡¦ behavior, salient individuals or groups, such as supervisors, co-workers¡A friends and families affact employees¡¦ behavior much more than their personal attitudes. The results only partially support the theory of behavior because information service industry is a highly skilled required. Employee who has willing to attend the training program is by personal professional needs instead of the self convinence level to training attendance or the diversites of training programs. This research provided factors affect intensions of employees¡¦ behavior in training programs and would be instructive suggestions to better understandig of training programs development in the future.