1. A method of forming a trace of an object, adapted for a multiple camera surveillance video system, the method comprising: a. selecting an object to track through an interactive user platform; b. identifying a first plurality of video sequences captured by the multiple camera surveillance video system within a recording time period, wherein each video sequence is associated with a level of correspondence to the object to track; c. generating a first object linking result by linking a second plurality of video sequences out of the first plurality of video sequences according to the levels of correspondence to the object to track; and d. if an error is found in a video sequence of the first object linking result, generating a second linking result from the first object linking result by replacing the erroneous video sequence with a video sequence selected through the interactive user platform and updating video sequences after the erroneous video sequence in the first object linking result according to the selected video sequence, wherein the selected video sequence is associated with a level of correspondence less than a level of correspondence associated with the erroneous video sequence.