English for general purposes (EGP) cannot suit in all work field, thus community realizes that English for specific purposes (ESP) is needed. As we know that ESP course is aimed to prepare the learners to execute specific task or set of tasks. Unfortunately, a research revealed that there were some problems related to a course, task assignment and teaching method. Therefore, Task Based Instructions (TBI), which carries out task or set of task, might be considered as one of suitable methods to be applied in this field. This research was conducted to uncover the advantages and limitations of implementing TBI in ESP classroom. This research was conducted in one of language center in Bandung. In order to gain comprehensive and reliable data, close-ended questionnaire, observation and interview were employed in this qualitative study. Hopefully, the finding of this research could be one of references in applying this method. Furthermore, different methodology and level of students can be considered for future study in similar research area.