My house is rented on the seventh floor, which is all my own. Do I have the right to remove and fine the security door installed in the corridor?

Although the entire 7th floor is yours, it is illegal for you to add one on the 7th floor and a monitoring anti-theft device on the roof of the 7th floor, because it is not allowed according to the requirements of the property. According to the requirements of fire control, it will increase the difficulty of your escape. Therefore, they definitely have regulations on the property and are not allowed to install it, so their general treatment is to let you tear it down. If you don't dismantle it, the other party will forcibly dismantle it and fine you.