For Bangladesh Citizen needs one of the following document to apply for Qatar ETA (Electronic Travel Authorisation):

• Have a valid Visit Visa or Residence Permit from any one of the following countries like Australia, Canada, GCC (Saudi Arabia, Kuwait, the United Arab Emirates, Qatar, Bahrain, and Oman), New Zealand, Schengen countries, USA or UK.
• Valid Qatar Residence Permit or ID from the inviter with proof of relationship. 
• Proof of Previous Visa or Residence permit of Qatar.
• Confirmed Hotel Voucher entier of stay (if applicable).
• Bank Statement, Investments, FDR or Salary Statement: Minimum salary USD 8000 yearly (If Applicable).
• Credit cards statement of Main Applicant (If Applicable)