With the information you've given us, there's absolutely, positively no way to answer your question.
What exactly do you want to do?
How do you plan to do it?
What kind of devices do you need to control?
Etc. etc. etc.
The hardest part, yet most important part of any automation project is defining your system. After you've defined it (who? what? when? where? why? how?) it can probably be automated... answer those questions and we can help answer your question.