A measuring system comprising: a measuring probe (500,600) including a stylus (536,636) having a contact part (562,662) to be in contact with an object to be measured, and a detection element (525,625) configured to be capable of detecting a movement of the contact part(562, 662); and a main body device (105,107) configured to movably support the measuring probe (500,600) and to obtain a shape of the object to be measured on a basis of an output of the measuring probe (500,600) when a plurality of predetermined threshold conditions are satisfied, wherein: the plurality of predetermined threshold conditions include a signal level (SL1-SL4) and a duration (T0, T1) of the signal level(SL1-SL4)each; the measuring probe (500,600) includes a signal synthesizing portion (564,664) configured to process the output of the detection element (525,625) to output a composite signal (Sc) obtained by synthesizing displacement components of the contact part (562,662) in three directions perpendicular to one another, and a plurality of comparing portions(570,670) configured to output digital touch signals(CP,CP1,CP2) to outside of the measuring probe (500, 600) when the measuring probe(500,600) measures the object to be measured and the composite signal(Sc) exceeds each of the signal levels(SL1-SL4), respectively; the measuring system is configured to obtain the shape of the object to be measured by processing on the durations in the outside of the measuring probe (500, 600), wherein the processing determines when each of the plurality of the digital touch signals exceeds the durations (T0, T1) of each of the signal levels (SL1-SL4) upon reception of the plurality of the digital touch signals. a measuring probe (500,600) including a stylus (536,636) having a contact part (562,662) to be in contact with an object to be measured, and a detection element (525,625) configured to be capable of detecting a movement of the contact part(562, 662); and a main body device (105,107) configured to movably support the measuring probe (500,600) and to obtain a shape of the object to be measured on a basis of an output of the measuring probe (500,600) when a plurality of predetermined threshold conditions are satisfied, wherein: the plurality of predetermined threshold conditions include a signal level (SL1-SL4) and a duration (T0, T1) of the signal level(SL1-SL4)each; the measuring probe (500,600) includes a signal synthesizing portion (564,664) configured to process the output of the detection element (525,625) to output a composite signal (Sc) obtained by synthesizing displacement components of the contact part (562,662) in three directions perpendicular to one another, and a plurality of comparing portions(570,670) configured to output digital touch signals(CP,CP1,CP2) to outside of the measuring probe (500, 600) when the measuring probe(500,600) measures the object to be measured and the composite signal(Sc) exceeds each of the signal levels(SL1-SL4), respectively; the measuring system is configured to obtain the shape of the object to be measured by processing on the durations in the outside of the measuring probe (500, 600), wherein the processing determines when each of the plurality of the digital touch signals exceeds the durations (T0, T1) of each of the signal levels (SL1-SL4) upon reception of the plurality of the digital touch signals. the plurality of predetermined threshold conditions include a signal level (SL1-SL4) and a duration (T0, T1) of the signal level(SL1-SL4)each; the measuring probe (500,600) includes a signal synthesizing portion (564,664) configured to process the output of the detection element (525,625) to output a composite signal (Sc) obtained by synthesizing displacement components of the contact part (562,662) in three directions perpendicular to one another, and a plurality of comparing portions(570,670) configured to output digital touch signals(CP,CP1,CP2) to outside of the measuring probe (500, 600) when the measuring probe(500,600) measures the object to be measured and the composite signal(Sc) exceeds each of the signal levels(SL1-SL4), respectively; the measuring system is configured to obtain the shape of the object to be measured by processing on the durations in the outside of the measuring probe (500, 600), wherein the processing determines when each of the plurality of the digital touch signals exceeds the durations (T0, T1) of each of the signal levels (SL1-SL4) upon reception of the plurality of the digital touch signals.