Method to synchronize and synthesize bus transaction traces for an un-timed virtual environment

The invention discloses to a method to synchronize and synthesize bus transaction traces for an un-timed virtual environment. The steps are the followings providing a simulation environment and an emulation environment; recording the transaction of intellectual property (IP) through the bus, collecting the plurality of continuously transferred transaction set, connecting a plurality of transaction blocks recorded from the simulation environment, and assigning a corresponding number to the transaction block; labeling a begin time mark and a transfer time mark; initializing a plurality of parameters; taking a transaction block; judging the type of the transaction block respectively; and after respectively assuring that the transaction block is the last transaction block in the simulated transaction block series, output these parameter values.