A tape printing system includes a control apparatus and a tape printer, wherein the control apparatus includes an image data generating section generating character strings and/or image data, and an image data transmitting section transmitting the generated character strings and/or image data to the tape printer, and the tape printer includes a processing pattern storing section storing a processing pattern for each tape type, the processing pattern of processing the character strings and/or image data to printing image data, a tape type determining section determining the tape type of a printing tape, an image data receiving section receiving the character strings and/or image data from the data transmitting section, a printing image data generating section generating printing image data by processing the received character strings and/or image data based on the processing pattern, and a tape printing section printing the generated printing image data on the printing tape.