It is the shortened form of V-(으)려고 하면, which is used to express a plan or intention to do something in the 1st sentence and the condition to fulfill the plan or intention in the 2nd sentence = if you want/ intend to… then you should...

There are a few ways to say "If" in Korean. Verb + (으)면 = If. It Is used for hypothetical situations. For Example: 제가 가면 - If I Go