DBS, what you have got from your employer now is a work visa, which allows you to enter Qatar and to WORK in Qatar. Now, based on this work visa, a Residence Permit (RP) should be issued, which allows you to LIVE in qatar.
And the status of this RP should allow you in the future to bring your family in. You have to discuss a matter of bringing your wife in Qatar with your employee. Because anyway, when you will apply for your wife's visa, the first thing you have to prepare is No Objection Certificate (NOC letter) from your Comapny stating that they don't mind you to bring your wife in Qatar. So better discuss it with them and make sure that the status of your visa will allow you in the future to do so.


*********************
"What lies behind us and what lies before us are small compared to what lies within us."
Oliver Wendell Holmes