This study focuses on the remote operation of construction machinery using close direct visual information, which is utilized during emergency response just after a disaster. An experiment was conducted to compare the task completion times between onboard and remote operations. In the experiment, operators were tasked with using a hydraulic excavator to remove randomly placed solid objects from a designated area, and their task completion times were measured, while video footage of the operations was recorded. Quantitative analysis of the obtained time duration data confirmed that remote operation takes significantly longer time than onboard operation. The primary reason for this difference was found to be the positioning operation conducted prior to the working operation, particularly when moving individual solid objects. This finding, which has not been previously highlighted, suggests that future improvements in remote operation efficiency should focus on enhancing the operational environment and the user interface, with special attention to the positioning operation.