Hi there Ngoc,
Unfortunately, your Disneyland Annual Passes are not valid for admission to the Walt Disney World Resort in Florida. You can, however upgrade those passes to the
Disney Premier Passport which will grant you access to both Disneyland in California AND Walt Disney World in Florida for a year. Your expiration date will remain the same as your current California Disneyland Annual Pass. You will just need to bring your Disneyland Annual Passes with you and you will pay the difference in value at the time of upgrade.
If you currently have the Disneyland Southern California Resident Passport, the difference in price would be around $560.00 based on current pricing. This new pass would also upgrade your current Disneyland SoCal Annual Pass to a Premium Annual Pass at Disneyland, so you won't have any block-out dates. Depending on the length of your visit to Walt Disney World, this may be a worthwhile upgrade.
If you have any additional questions concerning your upcoming vacation, please feel free to write back to me and I will be happy to help!
-Amanda F.