This study aims at examining critical factors of RFID technology adoption in logistics service providers (LSP) in Taiwan. The study adopts two phased expert questionnaire. First phase questionnaire applies fuzzy Delphi method to identity decision dimensions and factors affecting RFID's adoption. Second phase questionnaire applies fuzzy AHP method to calculate weighted values of decision dimensions and factors. Results indicate globalization trend, RFID introduction cost, technical interoperability and intention of upstream and downstream partner industry cooperation as four most critical decision factors. Empirical result could provide as reference for government, RFID's system developer and logistics service providers in promoting the RFID's commercial application.