1. Find a suitable office building: according to your own needs and budget, choose an office building with suitable location, convenient transportation and complete facilities.

2. Contact the housing agency or real estate company: By consulting the housing agency or real estate company, learn about the lease conditions, price, contract period and other related information of the office building.

3. Looking at the house and choosing the house: After contacting the housing agency or real estate company, you can make an appointment to look at the house and inspect the environment, office area and facilities of the office building on the spot. Choose the right office building according to your own needs and actual situation.

4. Sign a lease contract: After confirming the leased office building, sign a lease contract with the housing agency or real estate company. The contents of the contract need to clearly state the lease term, rent and payment method, liability for breach of contract, etc.

5. Pay rent and deposit: pay rent and deposit to the housing agency or real estate company on time as agreed in the contract.

6. Filing procedures: According to local regulations, office buildings need to go through filing procedures. The specific procedures and requirements may vary according to different regions, and you need to consult relevant departments or real estate agents.

7. office decoration and equipment procurement: decorate the office or purchase office equipment according to your own needs.

8. Carry out office activities: After receiving the key to the office building, you can officially enter the office building and start office activities.

It should be noted that dealing with office buildings may involve some legal and financial issues. It is recommended to consult professionals or lawyers in the process of handling to ensure their legitimate rights and interests.