user26000: I want to use Arduino(atmega8) on breadboard using USBASP programmer and want to use Serial Monitor without using any Arduino board as ISP programmer.
My questions: 1. Is such thing possible?
2. How do I do that?

user13432: 
How to use Serial Monitor without Arduino board?

Yes that is possible. Connect to the RX/TX pins on the breadboard chip. Remember these are 5V. You will need an Serial-USB or RS232 adapter to connect your development machine. Please see this blog post for some inspiration. 
Cheers!

26000: <p>I want to use Arduino(atmega8) on breadboard using USBASP programmer and want to use Serial Monitor without using any Arduino board as ISP programmer.
My questions: 1. Is such thing possible?
2. How do I do that?</p>
 13432: <blockquote>
  <p>How to use Serial Monitor without Arduino board?</p>
</blockquote>

<p>Yes that is possible. Connect to the RX/TX pins on the breadboard chip. Remember these are 5V. You will need an Serial-USB or RS232 adapter to connect your development machine. Please see this <a href="http://cosa-arduino.blogspot.se/2013/04/programming-attinyx5.html" rel="nofollow">blog post</a> for some inspiration. </p>

<p>Cheers!</p>
