I have visa of ajman but working in abu dhabi.how...

We would like to inform you that according to the residency law if you have a residence in Ajman and you want to move to Abu Dhabi, you can work in any emirate of the country without any need to get a new residency as long as the residence of Ajman is under validity.
However, if it is related to a commercial license and you want to transfer it, you can go to the Department of Economic Development for transferring the license and then work on it in Abu Dhabi