A data conversion processing system, including: a queue server to accumulate a queue that specifies data conversion processing to a different data format; and circuitry to execute a converter that performs conversion of data specified by the queue, and a converter number adjustment module provided at a container as a user space on an operating system, wherein the converter number adjustment module, in a case that a number of queues equal to or larger than a threshold value are accumulated in the queue server, forms at least one virtual converter that performs data conversion processing the same as the data conversion processing of the converter at the container, and performs the data conversion processing corresponding to the number of queues equal to or larger than the threshold value.