Actually the nature around us is called Vaastu which denotes something like a ‘shelter’ and Shastra is meant for the system. So ‘Vaastu Shastra’ reflects a system of shelter. Vaastu Shastra is an ancient science which sustains peace and harmony between man and nature. Thus ‘Vaastu’ shows us a way to prosperity and pleasure.

for more details click on the link given below:

http://www.gharexpert.com/category/1338/Vastu-Shastra-0.aspx?PL=2&CatID=1338&Estimator=&Category=Vastu%20Shastra

Thanks