Visitor Visa - B2

I would like to share my Experience and in need of valuable suggestion.

I had schedule for interview on 19/03/2018 in Hyderabad for B2 visa with my wife who is a government school teacher wish to tour usa in summer vacation. so our interview was at 9:30 AM in hyd. and also i have been refused alone twice from New delhi in 2004 and 2014 on B1 but it was first experience with wife on B1 so pls advice.

As i saw visa interview officer

me : Good morning sir, how are you
VO ; ya good morning i am good how about you.

VO : Purpose of visit ?
Me : Tourism sir as my wife is a govt school teacher we want to spend summer vacation in USA for 3 weeks sir.

VO : do you have any relatives in USA ?
ME : No sir.

VO : What do you do for living ?
ME : I am a proprietor and Managing director of Co which deals in Computer Hardware, Software designs, Safety and Security Products.

Vo : What is your Annual Income ?
Me : my self around 11 lakhs and my wife 6.5 lakhs

VO : Have you been abroad ?
ME : 14 years ago to Malaysia, Thailand and 2 years ago to QATAR, visa officer checked my passport, my wife travelled to uk 12 years ago but she dint informed because visa is on old passport he dint asked for old Booklet.

VO : do you have children ?
ME : 3 sir

VO : why you are not taking with you ?
ME : once our visa is approved we will submit for them as well.

VO : sorry you do not qualify for Non Immigrant visa.
Me : Thankyou sir.

he dint even asked any question to my wife nor did he checked any document, as i have prepaired each and every document including NOC from my wife's department.

Handed over me 214(B) letter.

So, I would like to know where was the mistake or shall i apply again but my status has not been changed.

so i am kindly requesting for your precious suggestion.