A method of controlling virtual content, a terminal device and a computer readable medium are provided. The terminal device includes a display configured to display a virtual object, a camera configured to capture a target image including a marker, at least one processor, and a memory. The memory stores one or more programs configured to be executed by the at least one processor. The one or more programs includes instructions of acquiring the target image including the marker, where a plurality of sub-markers is distributed on the marker; determining a blocked target, wherein the blocked target is a blocked sub-marker of the plurality of sub-markers in the target image; generating a control instruction according to the blocked target; and controlling the displayed virtual object based on the control instruction.