DC Output current control
Can I use a 14v 2A dc adapter on 12v 1A dc rated device?

Not directly. But with a buck converter to step down the voltage to 12V, yes.

I don't know how to control 2A current to 1A,because the device that i want to connect is rated as 12V 1A (As it's input).I'm afraid about that the current cause any damage to the device.

This is actually a very common confusion, so let me clarify a few things.
If a wall adaptor is rated (say) 15V 3A, it means the wall adaptor will output a voltage of 15V and its maximum output current is 3A. The 15V 3A rating doesn't mean that the wall adaptor will always push 3A through a load at all times at 15V, as that is impossible.
If a load is rated at (say) 12V 1A, it means that the load needs a voltage of 12V (with a small error tolerance) and that it will draw not more than 1A from the source. Even if you connect a 12V 10A power source to the load, the load will be perfectly fine and will draw a current less than or equal to 1A from the source.
So you can safely power a 12V 1A rated device by a 12V power source that can output atleast 1A.