My macbook pro mid 2012 turn off when i unplug charger
You're going to have to replace the battery I'm afraid.

Your battery is gone past it's lifetime and cannot function without a constant power supply.

This can be seen in the message you pasted - "Condition: Replace Now".

You can either buy a new battery and follow a guide to replace it yourself, bring it to a computer repair shop or bring it to an Apple Store.