QUESTION:

Is there any ways to see if the current project is saved as a baseline.

ANSWER:

In MS Project, the baseline is a part of the project. Go to Tools, Tracking, Save Baseline (Define Baseline in MSP 2007). Then look at every baseline in the drop down list (from Baseline to Baseline 10): an already saved baseline should be documented with the date it was saved.

BTW, to save a baseline means that the scheduling fields (Duration, Start, Finish, Work, Cost) were pasted in "Baseline xx" fields; it is very different from P3 where the baseline is another project.