If I get selected for a diploma in Australia from a recognized University, can I use it to get an education visa? I am from Pakistan. I want to move to Australia. One way to get points is to have an Australian diploma. I want to know if I am selected for a diploma from a recognized University in Austrlia, are there chances that I will be eligible for a education visa?
Visa advise is tricky.  At least in the UK, the recommendation is to leave this to a qualified visa and immigration professional.  

Factors might include whether you have paid all or some of your fees, the type and even subject of your course, the level of what you have studied before, whether you are studying full-time or part-time, where you are from etc.  And this will be dependent upon the laws of the region in which you intend to study.

Universities normally provide visa and immigration advice services, so I would suggest you ask the institution to which you have applied to see whether the course will support an education visa.

Needless to say, there is likely to be incomplete advice, at best, available from Stack Exchange.