Since the establishment of the WTO，the dispute settlement mechanism has been treated as a forum to settle trade disputes among the WTO Members. Till October 1^st，2013，Canada has brought disputes as the Claimant in 33 disputes and has been sued by other Members in 17 disputes. The article has discussed the Canada-Renewable Energies dispute with EU and Japan，analyzing the relationship between Article 3 of the GATT and Article 2 of the TRIMs，interpreting the meaning of “subsidy” according to the Article 2.1 of the SCM. Meanwhile the EU-Seal ban dispute which was brought by Canada and Norway has also been discussed here，several contentious issues in the dispute are researched in the paper to form an idea of the final result of the case.