This study validated and evaluated the feasibility of a web-based electronic behavior assessment system, ‘eBA’, designed to facilitate collaboration between caregivers and service providers (behavior analysts) in conducting indirect functional behavior assessment (FBA). In Phase 1, the content and the web architecture of the eBA were validated and refined through a formative evaluation by five behavior analysts. In Phase 2, the eBA system was pilot tested with 10 service providers and 10 caregivers using a post-test only control group design to examine the efficiency and quality of the system and identify the levels of satisfaction with the system by the service providers and caregivers. The results indicated that the eBA system components were appropriate to conduct indirect FBA and useful for use by caregivers and service providers collaboratively, gathered quality information, and showed higher levels of caregiver and service provider satisfaction, compared to traditional paper-pencil format of assessment.