Thank You Richard for your reply.
Actually Boost theme is very complicated like mustach etc.. and i have no knowledge about and theme also looks very complicated, Not like very simple and as clean theme.
Also, If i use theme_bootstrap as a parent theme and after making theme want to give my theme to anybody or want to sell . for this condition i need to give Bootstrap theme also with my zip folder. beacause this is not moodle default theme. That's the problem.
Thank You Again.