Design of elderly care buildings like nursing homes usually looks for balances between the livability for residents and the circulation efficiency for staffs and workers. Losing the balance between these two has the potential of either dissatisfying residents, uncomfortable living experiences, or causing low efficiency in operations, which might lead to extra working loads, longer service hours and higher service costs. This thesis first proposes an interactive computational methodology to embed daylight hour potential analysis and pathfinding of circulations into the early stage of the architectural design workflow, then the methodology is implemented to a test design case and the result is evaluated and compared to a manually designed result.