3. A non-transitory computer-readable storage medium having processor-executable instructions stored thereon for a disaster recovery method used in document editing, the processor-executable instructions, when executed by a processor, facilitating performance of the following steps: storing a document to a local copy directory to form a local copy while the document is being edited; submitting the document to a server when the editing of the document is finished; if the document is submitted successfully, deleting the local copy; and if the document is not submitted successfully, recovering the document by using the local copy; wherein recovering the document by using the local copy further comprises: when editing of the document is started, providing a reminder that submission of the document to the server failed; and providing a reminder that the following operations are allowed: processing the local copy immediately; processing the local copy later; and abandoning the local copy.
3. A non-transitory computer-readable storage medium having processor-executable instructions stored thereon for a disaster recovery method used in document editing, the processor-executable instructions, when executed by a processor, facilitating performance of the following steps: storing a document to a local copy directory to form a local copy while the document is being edited; submitting the document to a server when the editing of the document is finished; if the document is submitted successfully, deleting the local copy; and if the document is not submitted successfully, recovering the document by using the local copy; wherein recovering the document by using the local copy further comprises: when editing of the document is started, providing a reminder that submission of the document to the server failed; and providing a reminder that the following operations are allowed: processing the local copy immediately; processing the local copy later; and abandoning the local copy. 4. The non-transitory computer-readable storage medium according to claim 3 , wherein the processor-executable instructions, when executed, further facilitate performance of the following steps: if a user selects to process the local copy immediately, loading the local copy as the document to be edited.