If science is ruled by a body or like govern body and is doing some fellowship in a certain period of time and date, it would be a religion. If Science has a practice where everybody do it, it could be.

Therefore, SCIENCE is not a religion
Even Philosophy is not a religion.

However, there are religions who has their teachings based on Science. there's so called Science Christianism or Christian Science where they prove the things happened in the Bible with Science, especially the miracles.